ClipArt images of bipyramids, also known as dipyramids and deltahedrons, which are polyhedrons that connect 2 identical pyramids of any number of sides at their bases.

Illustration of a decagonal bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent pyramids at their bases. The bases in this illustration are decagons.

Decagonal Bipyramid

Illustration of a decagonal bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent…

Illustration of a decagonal bipyramid with hidden edges shown. A bipyramid, or dipyramid, is formed by joining two congruent pyramids at their bases. The bases in this illustration are decagons.

Decagonal Bipyramid

Illustration of a decagonal bipyramid with hidden edges shown. A bipyramid, or dipyramid, is formed…

Illustration of a hexagonal bipyramid with hidden edges shown. A bipyramid, or dipyramid, is formed by joining two congruent pyramids at their bases. The bases in this illustration are hexagons.

Hexagonal Bipyramid

Illustration of a hexagonal bipyramid with hidden edges shown. A bipyramid, or dipyramid, is formed…

Illustration of a hexagonal bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent pyramids at their bases. The bases in this illustration are hexagons.

Hexagonal Bipyramid

Illustration of a hexagonal bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent…

Illustration of a nonagonal bipyramid with hidden edges shown. A bipyramid, or dipyramid, is formed by joining two congruent pyramids at their bases. The bases in this illustration are nonagons.

Nonagonal Bipyramid

Illustration of a nonagonal bipyramid with hidden edges shown. A bipyramid, or dipyramid, is formed…

Illustration of a nonagonal bipyramid with hidden edges shown. A bipyramid, or dipyramid, is formed by joining two congruent pyramids at their bases. The bases in this illustration are nonagons.

Nonagonal Bipyramid

Illustration of a nonagonal bipyramid with hidden edges shown. A bipyramid, or dipyramid, is formed…

Illustration of a pentagonal bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent pyramids at their bases. The bases in this illustration are pentagons.

Pentagonal Bipyramid

Illustration of a pentagonal bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent…

Illustration of a pentagonal bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent pyramids at their bases. The bases in this illustration are pentagons.

Pentagonal Bipyramid

Illustration of a pentagonal bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent…

Illustration of a rectangular bipyramid viewed at an angle. A bipyramid, or dipyramid, is formed by joining two congruent pyramids at their bases.

Rectangular Bipyramid

Illustration of a rectangular bipyramid viewed at an angle. A bipyramid, or dipyramid, is formed by…

Illustration of a rectangular bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent pyramids at their bases.

Rectangular Bipyramid

Illustration of a rectangular bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent…

Illustration of a rectangular bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent pyramids at their bases.

Rectangular Bipyramid

Illustration of a rectangular bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent…

Illustration of a septagonal bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent pyramids at their bases. The bases in this illustration are heptagons/septagons.

Septagonal/Heptagonal Bipyramid

Illustration of a septagonal bipyramid. A bipyramid, or dipyramid, is formed by joining two congruent…

"...bounded by twenty-four scalene triangles...This form may be considered as a combination of two scalenohedra, a direct and an inverse." -The Encyclopedia Britannica 1910

Dihexagonal Bipyramid

"...bounded by twenty-four scalene triangles...This form may be considered as a combination of two scalenohedra,…

Principal forms of the hexagonal system: dihexagonal pyramid.

Dihexagonal Pyramid

Principal forms of the hexagonal system: dihexagonal pyramid.

Illustration of an elongated decagonal dipyramid that is formed by elongating a decagonal bipyramid by inserting a decagonal prism between the two congruent halves.

Elongated Decagonal Dipyramid

Illustration of an elongated decagonal dipyramid that is formed by elongating a decagonal bipyramid…

Illustration of an elongated decagonal dipyramid that is formed by elongating a decagonal bipyramid by inserting a decagonal prism between the two congruent halves.

Elongated Decagonal Dipyramid

Illustration of an elongated decagonal dipyramid that is formed by elongating a decagonal bipyramid…

Illustration of an elongated decagonal dipyramid that is formed by elongating a decagonal bipyramid by inserting a decagonal prism between the two congruent halves.

Elongated Decagonal Dipyramid

Illustration of an elongated decagonal dipyramid that is formed by elongating a decagonal bipyramid…

Illustration of an elongated heptagonal/septagonal dipyramid that is formed by elongating a heptagonal bipyramid by inserting a heptagonal prism between the two congruent halves.

Elongated Heptagonal/Septagonal Dipyramid

Illustration of an elongated heptagonal/septagonal dipyramid that is formed by elongating a heptagonal…

Illustration of an elongated heptagonal/septagonal dipyramid that is formed by elongating a heptagonal bipyramid by inserting a heptagonal prism between the two congruent halves.

Elongated Heptagonal/Septagonal Dipyramid

Illustration of an elongated heptagonal/septagonal dipyramid that is formed by elongating a heptagonal…

Illustration of an elongated heptagonal/septagonal dipyramid that is formed by elongating a heptagonal bipyramid by inserting a heptagonal prism between the two congruent halves.

Elongated Heptagonal/Septagonal Dipyramid

Illustration of an elongated heptagonal/septagonal dipyramid that is formed by elongating a heptagonal…

Illustration of an elongated hexagonal dipyramid that is formed by elongating a hexagonal bipyramid by inserting a hexagonal prism between the two congruent halves.

Elongated Hexagonal Dipyramid

Illustration of an elongated hexagonal dipyramid that is formed by elongating a hexagonal bipyramid…

Illustration of an elongated hexagonal dipyramid that is formed by elongating a hexagonal bipyramid by inserting a hexagonal prism between the two congruent halves.

Elongated Hexagonal Dipyramid

Illustration of an elongated hexagonal dipyramid that is formed by elongating a hexagonal bipyramid…

Illustration of an elongated hexagonal dipyramid that is formed by elongating a hexagonal bipyramid by inserting a hexagonal prism between the two congruent halves.

Elongated Hexagonal Dipyramid

Illustration of an elongated hexagonal dipyramid that is formed by elongating a hexagonal bipyramid…

Illustration of an elongated nonagonal dipyramid that is formed by elongating a nonagonal bipyramid by inserting a nonagonal prism between the two congruent halves.

Elongated Nonagonal Dipyramid

Illustration of an elongated nonagonal dipyramid that is formed by elongating a nonagonal bipyramid…

Illustration of an elongated nonagonal dipyramid that is formed by elongating a nonagonal bipyramid by inserting a nonagonal prism between the two congruent halves.

Elongated Nonagonal Dipyramid

Illustration of an elongated nonagonal dipyramid that is formed by elongating a nonagonal bipyramid…

Illustration of an elongated square dipyramid that is formed by elongating a square bipyramid by inserting a square prism between the two congruent halves.

Elongated Square Dipyramid

Illustration of an elongated square dipyramid that is formed by elongating a square bipyramid by inserting…

Illustration of an elongated square dipyramid that is formed by elongating a square bipyramid by inserting a square prism between the two congruent halves. The elongated dipyramid pictured here is tilted, or rotated, approximately 45°.

Elongated Square Dipyramid

Illustration of an elongated square dipyramid that is formed by elongating a square bipyramid by inserting…

"This is the general form; it is bounded by sixteen scalene triangles, and all the indices are unequal." -The Encyclopedia Britannica 1910

Ditetragonal Bipyramid

"This is the general form; it is bounded by sixteen scalene triangles, and all the indices are unequal."…

"...bounded by twelve isosceles trianes each of which are equally inclined to two planes of symmetry." -The Encyclopedia Britannica 1910

Hexagonal Bipyramid

"...bounded by twelve isosceles trianes each of which are equally inclined to two planes of symmetry."…

Principal forms of the hexagonal system: hexagonal pyramid.

Hexagonal Pyramid First Order

Principal forms of the hexagonal system: hexagonal pyramid.

Principal forms of the hexagonal system: hexagonal pyramid.

Hexagonal Pyramid Second Order

Principal forms of the hexagonal system: hexagonal pyramid.

"This is the general form and is bounded by eight scalene triangles." -The Encyclopedia Britannica 1910

Orthorhombic Bipyramids

"This is the general form and is bounded by eight scalene triangles." -The Encyclopedia Britannica 1910

"This is the general form and is bounded by eight scalene triangles." -The Encyclopedia Britannica 1910

Orthorhombic Bipyramids

"This is the general form and is bounded by eight scalene triangles." -The Encyclopedia Britannica 1910

"The dihexagonal pyramid is a form of twenty-four isoceles triangular faces, each of which intersects all three of the horizontal axes differently and intersects also the vertical axis." — Ford, 1912

Dihexagonal pyramid

"The dihexagonal pyramid is a form of twenty-four isoceles triangular faces, each of which intersects…

"The ditetragonal pyramid is a form composed of sixteen isoceles trianglular faces, each of which intersects all three of the crystallographic axes, cutting the two horizontal axes at different lengths." — Ford, 1912

Ditetragonal pyramid

"The ditetragonal pyramid is a form composed of sixteen isoceles trianglular faces, each of which intersects…

Illustration showing a ditetragonal pyramid.

Ditetragonal Pyramid

Illustration showing a ditetragonal pyramid.

"The pyramid of the first order is a form consisting of eight isoceles triangular faces, each of which interesects all three crystallographic axes, the intercepts upon the two horizontal axes being equal." — Ford, 1912

First order pyramid

"The pyramid of the first order is a form consisting of eight isoceles triangular faces, each of which…

Principal forms of the hexagonal system: scalenohedron

Scalenohedron

Principal forms of the hexagonal system: scalenohedron

A tetragonal bipyramidal crystal where the vertical axis is shorter than the horizontal axes.

Tetragonal Bipyramids

A tetragonal bipyramidal crystal where the vertical axis is shorter than the horizontal axes.

A tetragonal bipyramidal crystal where the vertical axis is longer than the horizontal axes.

Tetragonal Bipyramids

A tetragonal bipyramidal crystal where the vertical axis is longer than the horizontal axes.

Represents the relation between the tetragonal bipyramid of the first order when the indices are {111}.

Tetragonal Bipyramids of the First Order

Represents the relation between the tetragonal bipyramid of the first order when the indices are {111}.

Represents the relation between the tetragonal bipyramid of the first order when the indices are {111}.

Tetragonal Bipyramids of the Second Order

Represents the relation between the tetragonal bipyramid of the first order when the indices are {111}.

Principal forms of the triclinic system: tryclinic pyramid

Triclinic Pyramid

Principal forms of the triclinic system: tryclinic pyramid

"...bounded by six isosceles triangles...indices as in the hexagonal bipyramid." -The Encyclopedia Britannica 1910

Trigonal Bipyramid

"...bounded by six isosceles triangles...indices as in the hexagonal bipyramid." -The Encyclopedia Britannica…