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Illustration of a right octagonal pyramid with hidden edges shown. The base is an octagon and the faces are isosceles triangles.

Octagonal Pyramid

Illustration of a right octagonal pyramid with hidden edges shown. The base is an octagon and the faces…

Illustration of a hollow right octagonal pyramid. The base is an octagon and the faces are isosceles triangles. The pyramid is inverted, meaning that the vertex is at the bottom and the base is on top.

Inverted Octagonal Pyramid

Illustration of a hollow right octagonal pyramid. The base is an octagon and the faces are isosceles…

Illustration of a right pentagonal pyramid with hidden edges shown. The base is an pentagon and the faces are isosceles triangles.

Pentagonal Pyramid

Illustration of a right pentagonal pyramid with hidden edges shown. The base is an pentagon and the…

Illustration of a right pentagonal pyramid with hidden edges shown. The base is an pentagon and the faces are isosceles triangles.

Pentagonal Pyramid

Illustration of a right pentagonal pyramid with hidden edges shown. The base is an pentagon and the…

Illustration of a right pentagonal pyramid viewed from below with hidden edges shown. The base is an pentagon and the faces are isosceles triangles.

Pentagonal Pyramid

Illustration of a right pentagonal pyramid viewed from below with hidden edges shown. The base is an…

Illustration of a right pentagonal pyramid viewed from below. The base is an pentagon and the faces are isosceles triangles.

Pentagonal Pyramid

Illustration of a right pentagonal pyramid viewed from below. The base is an pentagon and the faces…

Illustration of 2 similar right pentagonal pyramids with hidden edges shown. The height of the pyramid and length of the side of the pentagon (base) on the smaller pentagonal pyramid are one half that of the larger.

Similar Pentagonal Pyramids

Illustration of 2 similar right pentagonal pyramids with hidden edges shown. The height of the pyramid…

Illustration of 2 right pentagonal pyramids with hidden edges shown. The pentagonal bases are congruent, but the height of the smaller pyramid is one half that of the larger.

2 Right Pentagonal Pyramids

Illustration of 2 right pentagonal pyramids with hidden edges shown. The pentagonal bases are congruent,…

Illustration of a right rectangular pyramid with hidden edges shown. The base is a rectangle and the faces are isosceles triangles.

Rectangular Pyramid

Illustration of a right rectangular pyramid with hidden edges shown. The base is a rectangle and the…

Illustration of a right rectangular pyramid with hidden edges shown. The base is a rectangle and the faces are isosceles triangles. The height of the pyramid is much larger then the length and width of the base.

Rectangular Pyramid

Illustration of a right rectangular pyramid with hidden edges shown. The base is a rectangle and the…

Illustration of 2 right rectangular pyramids with hidden edges shown. The rectangular bases are congruent, but the height of the smaller pyramid is one half that of the larger.

2 Right Rectangular Pyramids

Illustration of 2 right rectangular pyramids with hidden edges shown. The rectangular bases are congruent,…

Illustration of a non-right, or skewed, rectangular pyramid with hidden edges shown. The base is a rectangle and the faces are isosceles triangles.

Skewed Rectangular Pyramid

Illustration of a non-right, or skewed, rectangular pyramid with hidden edges shown. The base is a rectangle…

Illustration of a right rectangular pyramid with hidden edges shown. The base is a rectangle and the faces are isosceles triangles.

Rectangular Pyramid

Illustration of a right rectangular pyramid with hidden edges shown. The base is a rectangle and the…

Illustration of a hollow right rectangular pyramid. The base is a rectangle and the faces are isosceles triangles. The pyramid is inverted, meaning that the vertex is at the bottom and the base is on top.

Inverted Rectangular Pyramid

Illustration of a hollow right rectangular pyramid. The base is a rectangle and the faces are isosceles…

Illustration of a right rectangular pyramid with hidden edges shown. The base is a rectangle and the faces are isosceles triangles.

Rectangular Pyramid

Illustration of a right rectangular pyramid with hidden edges shown. The base is a rectangle and the…

Leaves - simple; opposite; edge entire. Outline - broad egg-shape or heart-shape. Apex - pointed. Base - heart-shape. Leaf - five to eight inches wide; smooth above, downy below, especially on the ribs. Bark - of trunk, a silver-gray, only slightly furrowed. Flowers - very showy and fragrant, in large, upright pyramid-shaped clusters; white or violet-tinged, spotted inside with yellow and purple. July. Fruit - in long, rounded pods (six to twelve inches long, about half an inch in diameter), with the seeds winged and fringed. They often remain throughout the winter. October. Found - new very widely naturalized throughout the Middle and Southern Atlantic States, though formerly a rare and local Southern tree. General Information - A low, very ornamental tree, usually twenty to thirty feet high. Its seeds and bark are considered medicinal. Another species, C. speciosa, Ward, larger and of more value, is sometimes met with in Southern Illinois and the adjoining States. Catalpa is probably a corruption of the Indian word Catawba, which was the name of an important tribe that occupied a large part of Georgia and the Carolinas.

Genus Catalpa, Scop., Walt. (Catalpa)

Leaves - simple; opposite; edge entire. Outline - broad egg-shape or heart-shape. Apex - pointed. Base…

Leaves - simple; indeterminate in position because of their closeness, but arranged along the branches in two-leaved sheathed bunches (On vigorous young shoots the leaves are sometimes clustered in threes, not on the old branches.) Leaf - needle-shape, two and a half to five inches long, usually four to five inches; dark green; slender; rounded on the outer side; on the inner side, hollowed. Cone - about two to three inches long, in old trees scarcely more than one and a half inches long; the smallest of the American Pine cones; surface roughened by the slightly projecting ends of the scales; not growing in large clusters. Scales - tipped with a weak prickle pointing outward. Found - in Staten Island and New Jersey, and southward to Western Florida; through the Gulf States, Arkansas, and parts of Kansas, Missouri, and Illinois. General Information - An evergreen tree forty to eighty feet high, with straight trunk, regular branches, and pyramid-shaped head. The timber is hard and very valuable, second in value (among the Yellow Pines) only to the "Georgia Pine" (P. palustris -" Long-leaved Pine," "Southern Pine").

Genus Pinus, L. (Pine)

Leaves - simple; indeterminate in position because of their closeness, but arranged along the branches…

Leaves - Simple; indeterminate in position because of their closeness; arranged singly up and down the branchlets, at first radiating about equally on every side, afterward flattened into two ranks, as in the Hemlock. Leaf - one half to one inch long, narrow; apex blunt or notched; edge entire; flat, with a grooved line above and a corresponding raised line below; bright green above; silvery white below. Bark - smooth and unbroken (especially when young), and usually covered with "blisters." Cones - two to four inches long, one inch broad, erect, at the sides of the branchlets; violet-colored. Scales - thin and flat, broad and rounded. The thin bracts between the scales are tipped with a slender bristle. The cone falls apart when ripe. Found - from the far North through the Northern States to Pennsylvania, and along the Alleghany Mountains to the high peaks of West Virginia. Common northward in damp forests. General Information - A slender, evergreen tree, twenty to sixty feet high; pyramid-shaped, with regular horizontal branches; its wood is very light and soft. From the "blisters," which form under the bark of the trunk and branches, the valuable Canada balsam is obtained. The tree is short-lived, and therefore of less value in cultivation.

Genus Abies, Link. (Fir)

Leaves - Simple; indeterminate in position because of their closeness; arranged singly up and down the…

Leaves - simple; indeterminate in position because of their smallness and closeness. They are arranged in four rows up and down the branchlets. In younger or rapidly growing sprouts the leaves are awl-shaped or needle-shaped, somewhat spreading from the branch, very sharp and stiff, placed in pairs (or sometimes in threes), usually about one fourth of an inch long, and with the fine branchlets, which they cover, rounded. In the older and slower-growing trees the leaves are scale-like and overlapping, egg-shape, closely pressed to the branchlets which they cover, and with the branchlets square. As the branchlets grow, the lower scales sometimes lengthen and become dry and chaffy and slightly spreading. Bark - brown and sometimes purplish-tinged, often shredding off with age and leaving the trunk smooth and polished. Berries - about the size of a small pea, closely placed along the branchlets, bluish, and covered with a whitish powder. Found - in Southern Canada, and distributed nearly throughout the United States - more widely than any other of the cone-bearing trees. General information - An evergreen tree, fifteen to thirty feet high (much larger at the South), usually pyramid-shaped, with a rounded base, but varying very greatly, especially near the coast, where it is often twisted and flattened into angular and weird forms. The wood is very valuable, light, straight-grained, durable, fragrant. It is largely used for posts, for cabinet-work, for interior finish, and almost exclusively in the making of lead pencils. The heart-wood is usually a dull red (whence the name), the sap-wood white. Among the most picturesque objects in the Turkish landscape, standing like sentinels, singly or in groups, and slender and upright as a Lombardy Poplar, are the black cypress trees (C. sempervirens). They mark the sites of graves, often of those which have long since disappeared. In America, more than any other northern tree, the red cedar gives the same sombre effect, whether growing wild or planted in cemeteries. The Common Juniper (J. communis, L.), common as a shrub, is occasionally found in tree form, low, with spreading or drooping branches, and with leaves resembling those of a young Red Cedar, awl-shaped and spreading, but arranged in threes instead of opposite.

Genus Juniperus, L. (Red Cedar)

Leaves - simple; indeterminate in position because of their smallness and closeness. They are arranged…

Leaves - compound (odd-feathered; leaflets eleven to thirty-one); alternate; edge of leaflets evenly and sharply toothed. Outline - of leaflet, narrow egg-shape. Apex - long, taper-pointed. Base, rounded or slightly heart-shaped. Leaflet/Stem - lacking. Leaf/Stem - densely velvety-hairy. Leaflet - usually two to four inches long and about one fourth as wide; the under surface whitish and more or less downy. Leaf - one or two feet or more in length. Branchlets - and stalks, especially towards their ends, covered with a very dense velvet-like down, often crimson-tinged. The just is milky and acid. Flowers - greenish-yellow, in upright, pyramid-shaped bunches at the ends of the branches. June. Berries - rounded, somewhat flattened, bright crimson velvety, crowded. Stone - smooth. Juice, acid. September, October. Found - from New Brunswick and the valley of the St. Lawrence through the Northern States, and southward along the Alleghany Mountains to Central Alabama. General Information - A small tree, ten to thirty feet high (or often a shrub), with straggling and evenly spreading branches that are leaved mostly toward their ends, giving an umbrella-like look to the tree. The wood is very soft and brittle; yellow within; the sap-wood white. The young shoots with the pith removed, are used in the spring as "sap quills" in drawing the sap from the sugar maples. The downy and irregular branchlets are suggestive of the horns of a stag, whence the name. An infusion of the berries is sometimes used as a gargle for sore-throat. This species is not poisonous. A variety with deeply gashed leaves (var. laciniata) is reported from Hanover, N. H.

Genus Rhus, L. (Sumach)

Leaves - compound (odd-feathered; leaflets eleven to thirty-one); alternate; edge of leaflets evenly…

Leaves - compound (odd-feathered; leaflets, nine to fifteen); alternate (often alternate in threes); edge of leaflets finely and sharply toothed. Outline - of leaflet, long and narrow egg-shape. Apex, taper-pointed. Base - rounded and slightly pointed. Leaflet/Stem - lacking, or very short. Leaf - eight to twelve inches long. Leaflet - two to three and one half inches long; surfaces smooth. Bark - of the trunk, reddish-brown and rather smooth. Flowers - small and white, in large, flat clusters, over the surface of the tree - fifty to one hundred or more flowers in a cluster. May, June. Fruit - very ornamental, about the size of peas, scarlet, in large, flat clusters, ripening in autumn and remaining into the winter. Found - from Labrador and Newfoundland through the Northern States and southward along the Alleghany Mountains. Its finest growth is on the northern shores of Lake Huron and Lake Superior. General Information - A slender, somewhat pyramid-shaped, tree, ten to thirty feet high, much and justly prized as one of the best of the native trees for ornamental planting. Its bark and the unripe fruit are very astringent, and are sometimes used medicinally. A slightly different species (P. sambucilolia) is sometimes found in cold swamps and on the borders of streams along the Northern frontier. The Mountain Ash or "Rowan Tree" has for a long time been renowned as a safeguard against witches and all evil spirits. A mere twig of it suffices. "Rowen-tree and red thread Put the witches to their speed." "The spells were vain, the hag returned To the queen in sorrowful mood, Crying that witches have no power Where there is row'n-tree wood."

Genus Pyrus, L. (Mountain Ash)

Leaves - compound (odd-feathered; leaflets, nine to fifteen); alternate (often alternate in threes);…

Section through the right kidney from its outer to its inner border. Labels: 1, cortex; 2, medulla; 2' , pyramid of Malpighi; 2", pyramid of Ferrein; 5, small branches of the renal artery entering between the pyramids; A, a branch of the renal artery; D, the pelvis of the kidney; U, ureter; C, a calyx.

Section of the Right Kidney

Section through the right kidney from its outer to its inner border. Labels: 1, cortex; 2, medulla;…

"Restoration of a group of tombs of the nobles in the Pyramid Age." -Breasted, 1914

Tombs

"Restoration of a group of tombs of the nobles in the Pyramid Age." -Breasted, 1914

A drawing of plowing and sowing in the Pyramid Age of Egypt. The hieroglyphs tell the story of the picture.

Plowing and Sowing

A drawing of plowing and sowing in the Pyramid Age of Egypt. The hieroglyphs tell the story of the picture.

"Donkey carrying a load of grain sheaves in the Pyramid Age." -Breasted, 1914.

Donkeys

"Donkey carrying a load of grain sheaves in the Pyramid Age." -Breasted, 1914.

Carpenters in the Pyramid Age of Egypt.

Egyptian Carpenters

Carpenters in the Pyramid Age of Egypt.

The Coat of Arms of Egypt.

Egyptian Coat of Arms

The Coat of Arms of Egypt.

Egypt Stamp (10 para) from 1865

Egypt 10 Para Stamp, 1865

Egypt Stamp (10 para) from 1865

Brawl among Egyptian boatmen. Carving from the tomb of Ptah-hetep during the Pyramid age.

Egyptian Boatmen Fighting

Brawl among Egyptian boatmen. Carving from the tomb of Ptah-hetep during the Pyramid age.

Illustration of a plan and elevation of an oblique pentagonal pyramid.

Oblique Pentagonal Pyramid

Illustration of a plan and elevation of an oblique pentagonal pyramid.

Illustration of the isometric of an oblique pentagonal pyramid.

Isometric of Oblique Pentagonal Pyramid

Illustration of the isometric of an oblique pentagonal pyramid.

"The bases of the pyramids are considered as forming the surface of the sphere, while the altitude of the pyramids is the radius of the sphere." -Foster, 1921

Area of Sphere

"The bases of the pyramids are considered as forming the surface of the sphere, while the altitude of…

Anterior or dorsal section of the medulla oblongata in the region of the superior pyramidal decussation. a.m.f, anterior median fissure; f.a., superficial arciform fibers emerging from the fissure; py., pyramid, n.ar., nuclei of arciform fibers; f.a., deep arciform becoming superficial; o, lower end of olivary nucleus; n.l., nucleus lateralis; f.r., formatio reticularis; f.a. 2, arciform fibers proceeding from the formatio reicularis; g, substantia gelatinosa of Rolando; a.V., ascending root of fifth nerve; n.c., nucleus cuneatus; n.c.', external cuneate nucleus; n.g., nucleus gracilis; f.g., funiculus gracilis; p.m.f., posterior median fissure; c., central canal surrounded by gray matter, in which are n. XI., nucleus of the spinal accessory, and n. XII., nucleus of the hypoglossal; s.d., superior pyramidal decussation.

Medulla Oblongata

Anterior or dorsal section of the medulla oblongata in the region of the superior pyramidal decussation.…

Section of the medulla oblongata at about the middle of the olivary body. f.l.a., anterior median fissure; n.ar., nucleus arciformis; p., pyramid; XII., bundle of hypoglossal nerve emerging from the surface; at b, it is seen coursing between the pyramid and the olivary nucleus, o.; f.a.e., external arciform fibers; n.l., nucleus lateralis; a., arciform fibers passing towards restiform body, partly through the substantia gelatinosa, g., partly superficial to the ascending root of the fifth nerve, a.V.; X., bundle of vagus root emerging; f.r., formatio reticularis; c.r., corpus restiform, beginning to be formed, chiefly by arciform fibers, superficial and deep; n.c., nucleus of the funiculus teres; n.am., nucleus ambiguus; r., raphe; A., continuation of the anterior column of cord; o', o", accessory olivary nucleus; p.o., pedunculus olivae.

Medulla Oblongata

Section of the medulla oblongata at about the middle of the olivary body. f.l.a., anterior median fissure;…

The cerebellum in section and fourth ventricle, with the neighboring parts. Labels: 1, median groove of fourth ventricle, ending below in the calamus scriptorius, with the longitudinal eminence formed by the fasciculi teretes, one on each side; 2, the same groove, at the place where the white streaks of th auditory nerve emerge from it to cross the floor of the ventricle; 3, in inferior crus or peduncle of the cerebellum, formed by the restiform body; 4, posterior pyramid; above this is the calamus scriptorius; 5, superior crus of cerebellum, or processus e cerebello ad cerebrum( or ad testes); 6, fillet to the side of the crura cerebri; 7, lateral grooves of the crura cerebri; 8, corpora quadrigemina.

The Cerebrum and Fourth Ventricle of the Brain

The cerebellum in section and fourth ventricle, with the neighboring parts. Labels: 1, median groove…

Outline sketch of a section of the cerebellum, showing the corpus dentatum. The section has been carried through the left lateral part of the pons, so as to divide the superior peduncle and pass nearly through the middle of the left cerebellar hemisphere. The olivary body has also been divided longitudinally so as to expose in section its corpus dentatum. c r, crus cerebri; f, fillet; q, corpora quadrigemina; s p, superior peduncle of the cerebellum divided; m p, middle peduncle or lateral part of the pons Varolii, with fibers passing from it into the white stem; a v, continuation of the white stem radiating towards the arbor vitae of the folia; c d, corpus dentatum; o, olivary body with its corpus dentatum; p, anterior pyramid.

The Cerebellum of the Brain

Outline sketch of a section of the cerebellum, showing the corpus dentatum. The section has been carried…

"Some other species, the names of which indicate a winding pyramid, have shells terminating in a sharp point, some of them having fluted spirals, others rounded, angular or flat."

Turritella Replicata (Linnaeus)

"Some other species, the names of which indicate a winding pyramid, have shells terminating in a sharp…

"Some other species, the names of which indicate a winding pyramid, have shells terminating in a sharp point, some of them having fluted spirals, others rounded, angular or flat."

Turritella Angulata (Sowerby)

"Some other species, the names of which indicate a winding pyramid, have shells terminating in a sharp…

"Some other species, the names of which indicate a winding pyramid, have shells terminating in a sharp point, some of them having fluted spirals, others rounded, angular or flat."

Turritella Sanguinea (Reeve)

"Some other species, the names of which indicate a winding pyramid, have shells terminating in a sharp…

"Some other species, the names of which indicate a winding pyramid, have shells terminating in a sharp point, some of them having fluted spirals, others rounded, angular or flat."

Turritella Goniostoma

"Some other species, the names of which indicate a winding pyramid, have shells terminating in a sharp…

"Some other species, the names of which indicate a winding pyramid, have shells terminating in a sharp point, some of them having fluted spirals, others rounded, angular or flat."

Turritella Terebellata (Lamarck)

"Some other species, the names of which indicate a winding pyramid, have shells terminating in a sharp…

Illustration used to compare the volumes of a pyramid and a prism by emptying sand from the pyramid into the prism.

Comparative Volumes Of A Pyramid And Prism

Illustration used to compare the volumes of a pyramid and a prism by emptying sand from the pyramid…

Illustration showing that "the solids formed by the dissected part of the sphere are pyramids."

Sphere Formed By Pyramids

Illustration showing that "the solids formed by the dissected part of the sphere are pyramids."

"Vertical Section of the Great pyramid, looking West showing A. Entrance passage. B. A later opening. D. First ascending passage. E. Horizontal Passage. F. Queen's chamber. G G. Grand gallery. H. Antechamber. I. Coffer. K. King's chamber. M N. Ventilating chambers. O. Subterranean chamber. P. Well, so-called. R R R. Probable extent to which the native rock is employed to assist the masonry of the building." - West, 1904

Vertical section of the Great Pyramid

"Vertical Section of the Great pyramid, looking West showing A. Entrance passage. B. A later opening.…

Illustration showing a tetragonal deuteropyramid.

Tetragonal Deuteropyramid

Illustration showing a tetragonal deuteropyramid.

Illustration showing a ditetragonal pyramid.

Ditetragonal Pyramid

Illustration showing a ditetragonal pyramid.

Illustration showing two rhombic pyramids.

Rhombic Pyramids

Illustration showing two rhombic pyramids.

Showing the development of the cerebellum. A, Transverse section through the forepart of the cerebellum of a sheep embryo. B, Transverse section through the hinder part of the cerebellum of a sheep embryo. C, Cerebellum of a human fetus 17 cm long. D, Median section through cerebellum of sheep embryo 5 cm long.E, Median section through cerebellum of human fetus 17 cm long. Labels: 1, sulcus primarius; 2, sulcus above and afterwards behind the pyramid; 3, sulcus between pyramid and uvula; 4, great horizontal fissure; r.l., lateral recess ventricle IV; T, transverse groove in roof of ventricle IV.

Development of Cerebellum

Showing the development of the cerebellum. A, Transverse section through the forepart of the cerebellum…

An illustration of two pyramids. A pyramid is a building where the upper surfaces are triangular and converge on one point. The base of pyramids are usually quadrilateral or trilateral (but generally may be of any polygon shape), meaning that a pyramid usually has three or four sides. A pyramid's design, with the majority of the weight closer to the ground, means that less material higher up on the pyramid will be pushing down from above.

Pyramids

An illustration of two pyramids. A pyramid is a building where the upper surfaces are triangular and…

An section illustration of the Great Pyramid.

Great Pyramid Section

An section illustration of the Great Pyramid.

A: King's Chamber; B: Queen's Chamber; C: Chamber Cut in Rock.

Section of Great Pyramid

A: King's Chamber; B: Queen's Chamber; C: Chamber Cut in Rock.

At the end of the lengthy series of entrance ways leading into the interior is the structure's main chamber, the King's Chamber. This chamber was originally 10 × 20 × 11.2 cubits, or about 5.25 m × 10.5 m × 6 m, comprising a double 10 × 10 cubit square, and a height equal to half the double square's diagonal.

Section of the King's Chamber

At the end of the lengthy series of entrance ways leading into the interior is the structure's main…

The Great Sphinx is a statue with the face of a man and the body of a lion. Blocks of stone weighing upwards of 200 tons were quarried in the construction phase to build the adjoining Sphinx Temple. It is located on the west bank of the Nile River within the confines of the Giza pyramid field. The Great Sphinx faces due east, with a small temple between its paws.

Ruins of the Sphinx Temple

The Great Sphinx is a statue with the face of a man and the body of a lion. Blocks of stone weighing…

One, structural and pyramidal, is represented by many examples at Abydos, the most venerated of all the burial grounds of Egypt. All of these are built of brick, and are of moderate size and little artistic interest.

Tomb at Abydos

One, structural and pyramidal, is represented by many examples at Abydos, the most venerated of all…

The Great Sphinx is a statue with the face of a man and the body of a lion. Blocks of stone weighing upwards of 200 tons were quarried in the construction phase to build the adjoining Sphinx Temple. It is located on the west bank of the Nile River within the confines of the Giza pyramid field. The Great Sphinx faces due east, with a small temple between its paws.

Plan of the Sphinx Temple

The Great Sphinx is a statue with the face of a man and the body of a lion. Blocks of stone weighing…

The Great Pyramid of Giza, also called Khufu's Pyramid or the Pyramid of Khufu, and Pyramid of Cheops, is the oldest and largest of the three pyramids in the Giza Necropolis bordering what is now Cairo, Egypt, and is the only remaining member of the Seven Wonders of the Ancient World.

Great Pyramid of Giza

The Great Pyramid of Giza, also called Khufu's Pyramid or the Pyramid of Khufu, and Pyramid of Cheops,…

The Great Pyramid of Giza, also called Khufu's Pyramid or the Pyramid of Khufu, and Pyramid of Cheops, is the oldest and largest of the three pyramids in the Giza Necropolis bordering what is now Cairo, Egypt, and is the only remaining member of the Seven Wonders of the Ancient World. The Great Pyramid is the only pyramid known to contain both ascending and descending passages. There are three known chambers inside the Great Pyramid. These are arranged centrally, on the vertical axis of the pyramid.

Great Pyramid of Giza, Cross Section

The Great Pyramid of Giza, also called Khufu's Pyramid or the Pyramid of Khufu, and Pyramid of Cheops,…

The Grand Gallery features a corbel haloed design and several cut "sockets" spaced at regular intervals along the length of each side of its raised base with a "trench" running along its center length at floor level. What purpose these sockets served is unknown. An antechamber leads from the Grand Gallery to the King's Chamber.

Great Pyramid of Giza, Section of the Grand Gallery

The Grand Gallery features a corbel haloed design and several cut "sockets" spaced at regular…

The King's Chamber is lined with red granite brought from Aswan 935 km (580 miles) to the south, of which the blocks used for the roof are estimated to weigh 50 to 80 tons. Egyptologists believe they were transported on barges down the Nile river.

Great Pyramid of Giza, King's Chamber

The King's Chamber is lined with red granite brought from Aswan 935 km (580 miles) to the south, of…

Principal forms of the hexagonal system: hexagonal pyramid.

Hexagonal Pyramid First Order

Principal forms of the hexagonal system: hexagonal pyramid.