ClipArt ETC
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…

Illustration used to prove the Pythagorean Theorem, according to Euclid. A perpendicular is drawn from the top vertex of the right triangle extended through the bottom square, forming 2 rectangles. Each rectangle has the same area as one of the two legs. This proves that the sum of the squares of the legs is equal to the square of the hypotenuse (Pythagorean Theorem).

Euclid's Pythagorean Theorem Proof

Illustration used to prove the Pythagorean Theorem, according to Euclid. A perpendicular is drawn from…

A triangle and a T-square can be used in conjunction to draw a rectangle.

Drawing Rectangles

A triangle and a T-square can be used in conjunction to draw a rectangle.

Illustration of a rectangle divided in half.

Rectangle, 1/2 Fraction

Illustration of a rectangle divided in half.

This fraction chart can be used for students to find A, B, and C in percentage. It can also be used to answer these questions (if it is 2.5 by 2 inches): "How many square inches in the entire figure? How many square inches in C? What part of a square inch is B? How large is A when compared to C? How large is B when compared to A? Into how many quarter-inch squares could you divide the whole figure?" -Foster, 1921

Fraction Chart

This fraction chart can be used for students to find A, B, and C in percentage. It can also be used…

The shaded region represents 2/3 of rectangle.

Two Thirds

The shaded region represents 2/3 of rectangle.

The shaded region represents 2/5 of rectangle. III can be compared to I and II to find that it is made I is made up of 2 IIIs.

Two Fifths

The shaded region represents 2/5 of rectangle. III can be compared to I and II to find that it is made…

The shaded region represents 3/7 of the rectangle. I and II are the size of 3 IIIs.

Three Sevenths

The shaded region represents 3/7 of the rectangle. I and II are the size of 3 IIIs.

The shaded region represents 5/8 of the rectangle. If II is divided in to thirds, then those pieces are equal to the five in I.

Five Eighths

The shaded region represents 5/8 of the rectangle. If II is divided in to thirds, then those pieces…

"The triangle ABC is divided into 2 right triangles I and II. ABC is seen to be equal to 1/2 of the rectangle ABNO." -Foster, 1921

Area of Triangle

"The triangle ABC is divided into 2 right triangles I and II. ABC is seen to be equal to 1/2 of the…

"The child sees triangle ACB = triangle ADB, and that I + II = CA - DB; and so he sees that the area of triangle=1/2 area of rectangle whose base and altitude are the same as those of the triangles." -Foster, 1921

Area of Triangle

"The child sees triangle ACB = triangle ADB, and that I + II = CA - DB; and so he sees that the area…

"Fig. 3 shows triangle I = triangle II, III = IV, and so triangle ABC = 1/2 of rectangle ABDE. The fact is realized that the area of a triangle equals 1/2 the product of the base and altitude." -Foster, 1921

Area of Triangle

"Fig. 3 shows triangle I = triangle II, III = IV, and so triangle ABC = 1/2 of rectangle ABDE. The fact…

"From Figure 4 he sees a parallelogram equal to a rectangle of the same base and altitude. Cut out and paste in rectangle form." -Foster, 1921

Area of Parallelogram

"From Figure 4 he sees a parallelogram equal to a rectangle of the same base and altitude. Cut out and…

"The student sees the trapezoid is equal in area to a rectangle whose base is the average base of the trapezoid, and whose altitude is the same as that of the trapezoid." -Foster, 1921

Area of Trapezoid

"The student sees the trapezoid is equal in area to a rectangle whose base is the average base of the…

"The student sees the trapezoid is equal in area to a rectangle whose base is the average base of the trapezoid, and whose altitude is the same as that of the trapezoid." -Foster, 1921

Area of Trapezoid

"The student sees the trapezoid is equal in area to a rectangle whose base is the average base of the…

In military affairs, a narrow ditch or trench by which approach is made to a fortress or designed place when within range of fire. This is sap on a rectangular plan.

Rectangular Sap

In military affairs, a narrow ditch or trench by which approach is made to a fortress or designed place…

Labeled shapes showing various measures of form.

Measures of Form

Labeled shapes showing various measures of form.

Showing different types of forms or shapes: rectangle, right triangle, acute triangle, and obtuse triangle.

Forms

Showing different types of forms or shapes: rectangle, right triangle, acute triangle, and obtuse triangle.

Four different types of forms or shapes: right triangle, isosceles triangle, rectangle, and circle.

Shapes

Four different types of forms or shapes: right triangle, isosceles triangle, rectangle, and circle.

Illustration of a pentagonal prism showing, "If a piece of paper is fitted to cover the convex surface of a prism or a cylinder, and then unrolled, its form will be that of a rectangle, as ABCD."

Surfaces Of A Prism

Illustration of a pentagonal prism showing, "If a piece of paper is fitted to cover the convex surface…

Illustration of a cylinder showing, "If a piece of paper is fitted to cover the convex surface of a prism or a cylinder, and then unrolled, its form will be that of a rectangle, as ABCD."

Surfaces Of A Cylinder

Illustration of a cylinder showing, "If a piece of paper is fitted to cover the convex surface of a…

A coffer in architecture, is a sunken panel in the shape of a square, rectangle, or octagon in a ceiling, soffit or vault. A series of these sunken panels were used as decoration for a ceiling or a vault. The stone coffers of the ancient Greeks and Romans are the earliest surviving examples.A, from Palmyra; B, Basilica of Constantine.

Roman Ceiling Panels

A coffer in architecture, is a sunken panel in the shape of a square, rectangle, or octagon in a ceiling,…

"The Metre Bridge is employed - a piece of apparatus which is illustrated [here]. It consists of a wooden base, upon the upper face of which is mounted a metallic rectangle; three sides of this rectangle are formed by a broad substantial copper band - having a negligible resistance - and the fourth consists of a platinum silver wire w w joining the copper blocks P and p. This wire is exactly one meter long, and over it slides a key K, which when depressed makes contact by means of a platinum knife-edge with the wire; the exact point on the wire at which this contact is made is indicated by an arrow-head on the key, which slides against a scale, as shown." (Britannica, 1891)

Metre Bridge

"The Metre Bridge is employed - a piece of apparatus which is illustrated [here]. It consists of a wooden…

Illustration of a circle inside of a rectangle. The two figures have the same center.

Circle Inside Rectangle

Illustration of a circle inside of a rectangle. The two figures have the same center.

Illustration of a circle inside of 2 concentric rectangles whose vertices are connected by line segments.

Circle Inside Concentric Rectangles

Illustration of a circle inside of 2 concentric rectangles whose vertices are connected by line segments.

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures consisting of triangles, squares, and parallelograms are used to construct the given shape. This tangram depicts a rectangle.

Rectangle

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures consisting of triangles, squares, and parallelograms are used to construct the given shape. This tangram depicts a rectangle.

Rectangle

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures consisting of triangles, squares, and parallelograms are used to construct the given shape. This tangram depicts a rectangle.

Rectangle

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures consisting of triangles, squares, and parallelograms are used to construct the given shape. This tangram depicts a rectangle.

Rectangle

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

Outlines of shapes (rectangle, parallelogram, isosceles triangle, double arrow, rhombus, hexagon) made from tangram pieces. Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. 7 figures consisting of triangles, squares, and parallelograms are used to construct the given shapes.

Shapes Outline Tangram Card

Outlines of shapes (rectangle, parallelogram, isosceles triangle, double arrow, rhombus, hexagon) made…

Solutions for outlines of shapes (rectangle, parallelogram, isosceles triangle, double arrow, rhombus, hexagon) made from tangram pieces. Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. 7 figures consisting of triangles, squares, and parallelograms are used to construct the given shapes.

Shapes Outline Solution Tangram Card

Solutions for outlines of shapes (rectangle, parallelogram, isosceles triangle, double arrow, rhombus,…

Silhouette outlines of shapes (rectangle, parallelogram, isosceles triangle, double arrow, rhombus, hexagon) made from tangram pieces. Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. 7 figures consisting of triangles, squares, and parallelograms are used to construct the given shapes.

Shapes Silhouette Tangram Card

Silhouette outlines of shapes (rectangle, parallelogram, isosceles triangle, double arrow, rhombus,…

The Two-Direction Large Arrow sign shall be a horizontal rectangle. If used, it shall be installed on the far side of a T-intersection in line with, and at approximately a right angle to, approaching traffic. The Two-Direction Large Arrow sign shall not be used where there is no change in the direction of travel such as at the beginnings and ends of medians or at center piers.

Two-Direction Large Arrow, Black and White

The Two-Direction Large Arrow sign shall be a horizontal rectangle. If used, it shall be installed on…

The Two-Direction Large Arrow sign shall be a horizontal rectangle. If used, it shall be installed on the far side of a T-intersection in line with, and at approximately a right angle to, approaching traffic. The Two-Direction Large Arrow sign shall not be used where there is no change in the direction of travel such as at the beginnings and ends of medians or at center piers.

Two-Direction Large Arrow, Color

The Two-Direction Large Arrow sign shall be a horizontal rectangle. If used, it shall be installed on…

The Two-Direction Large Arrow sign shall be a horizontal rectangle. If used, it shall be installed on the far side of a T-intersection in line with, and at approximately a right angle to, approaching traffic. The Two-Direction Large Arrow sign shall not be used where there is no change in the direction of travel such as at the beginnings and ends of medians or at center piers.

Two-Direction Large Arrow, Outline

The Two-Direction Large Arrow sign shall be a horizontal rectangle. If used, it shall be installed on…

The Two-Direction Large Arrow sign shall be a horizontal rectangle. If used, it shall be installed on the far side of a T-intersection in line with, and at approximately a right angle to, approaching traffic. The Two-Direction Large Arrow sign shall not be used where there is no change in the direction of travel such as at the beginnings and ends of medians or at center piers.

Two-Direction Large Arrow, Silhouette

The Two-Direction Large Arrow sign shall be a horizontal rectangle. If used, it shall be installed on…

Color flag of Georgia. White rectangle, in its central portion a red cross connecting all four sides of the flag; in each of the four corners is a small red bolnur-katskhuri cross; the five-cross flag appears to date back to the 14th century.

Flag of Georgia, 2009

Color flag of Georgia. White rectangle, in its central portion a red cross connecting all four sides…

Black and white outline flag of Georgia. White rectangle, in its central portion a red cross connecting all four sides of the flag; in each of the four corners is a small red bolnur-katskhuri cross; the five-cross flag appears to date back to the 14th century

Flag of Georgia, 2009

Black and white outline flag of Georgia. White rectangle, in its central portion a red cross connecting…

Color flag of Grenada. A rectangle divided diagonally into yellow triangles (top and bottom) and green triangles (hoist side and outer side), with a red border around the flag; there are seven yellow, five-pointed stars with three centered in the top red border, three centered in the bottom red border, and one on a red disk superimposed at the center of the flag; there is also a symbolic nutmeg pod on the hoist-side triangle (Grenada is the world's second-largest producer of nutmeg, after Indonesia); the seven stars represent the seven administrative divisions.

Flag of Grenada, 2009

Color flag of Grenada. A rectangle divided diagonally into yellow triangles (top and bottom) and green…

Black and white outline flag of Grenada. A rectangle divided diagonally into yellow triangles (top and bottom) and green triangles (hoist side and outer side), with a red border around the flag; there are seven yellow, five-pointed stars with three centered in the top red border, three centered in the bottom red border, and one on a red disk superimposed at the center of the flag; there is also a symbolic nutmeg pod on the hoist-side triangle (Grenada is the world's second-largest producer of nutmeg, after Indonesia); the seven stars represent the seven administrative divisions

Flag of Grenada, 2009

Black and white outline flag of Grenada. A rectangle divided diagonally into yellow triangles (top and…

Color flag of Malaysia. 14 equal horizontal stripes of red (top) alternating with white (bottom); there is a blue rectangle in the upper hoist-side corner bearing a yellow crescent and a yellow 14-pointed star; the crescent and the star are traditional symbols of Islam; the design was based on the flag of the US.

Flag of Malaysia, 2009

Color flag of Malaysia. 14 equal horizontal stripes of red (top) alternating with white (bottom); there…

Black and white outline flag of Malaysia. 14 equal horizontal stripes of red (top) alternating with white (bottom); there is a blue rectangle in the upper hoist-side corner bearing a yellow crescent and a yellow 14-pointed star; the crescent and the star are traditional symbols of Islam; the design was based on the flag of the US

Flag of Malaysia, 2009

Black and white outline flag of Malaysia. 14 equal horizontal stripes of red (top) alternating with…

Color flag of Maldives. Red with a large green rectangle in the center bearing a vertical white crescent; the closed side of the crescent is on the hoist side of the flag.

Flag of Maldives, 2009

Color flag of Maldives. Red with a large green rectangle in the center bearing a vertical white crescent;…

Black and white outline flag of Maldives. Red with a large green rectangle in the center bearing a vertical white crescent; the closed side of the crescent is on the hoist side of the flag

Flag of Maldives, 2009

Black and white outline flag of Maldives. Red with a large green rectangle in the center bearing a vertical…

Color flag of Samoa. Red with a blue rectangle in the upper hoist-side quadrant bearing five white five-pointed stars representing the Southern Cross constellation.

Flag of Samoa, 2009

Color flag of Samoa. Red with a blue rectangle in the upper hoist-side quadrant bearing five white five-pointed…

Black and white outline flag of Samoa. Red with a blue rectangle in the upper hoist-side quadrant bearing five white five-pointed stars representing the Southern Cross constellation

Flag of Samoa, 2009

Black and white outline flag of Samoa. Red with a blue rectangle in the upper hoist-side quadrant bearing…

Color flag of Sri Lanka. Yellow with two panels; the smaller hoist-side panel has two equal vertical bands of green (hoist side) and orange; the other panel is a large dark red rectangle with a yellow lion holding a sword, and there is a yellow bo leaf in each corner; the yellow field appears as a border around the entire flag and extends between the two panels.

Flag of Sri Lanka, 2009

Color flag of Sri Lanka. Yellow with two panels; the smaller hoist-side panel has two equal vertical…

Black and white outline flag of Sri Lanka. Yellow with two panels; the smaller hoist-side panel has two equal vertical bands of green (hoist side) and orange; the other panel is a large dark red rectangle with a yellow lion holding a sword, and there is a yellow bo leaf in each corner; the yellow field appears as a border around the entire flag and extends between the two panels

Flag of Sri Lanka, 2009

Black and white outline flag of Sri Lanka. Yellow with two panels; the smaller hoist-side panel has…

Color flag of Taiwan. Red field with a dark blue rectangle in the upper hoist-side corner bearing a white sun with 12 triangular rays.

Flag of Taiwan, 2009

Color flag of Taiwan. Red field with a dark blue rectangle in the upper hoist-side corner bearing a…

Color flag of Tajikistan. Red field with a dark blue rectangle in the upper hoist-side corner bearing a white sun with 12 triangular rays.

Flag of Tajikistan, 2009

Color flag of Tajikistan. Red field with a dark blue rectangle in the upper hoist-side corner bearing…

Black and white outline flag of Tajikistan. Red field with a dark blue rectangle in the upper hoist-side corner bearing a white sun with 12 triangular rays

Flag of Tajikistan, 2009

Black and white outline flag of Tajikistan. Red field with a dark blue rectangle in the upper hoist-side…

Color flag of Tonga. Red with a bold red cross on a white rectangle in the upper hoist-side corner.

Flag of Tonga, 2009

Color flag of Tonga. Red with a bold red cross on a white rectangle in the upper hoist-side corner.

Black and white outline flag of Tonga. Red with a bold red cross on a white rectangle in the upper hoist-side corner

Flag of Tonga, 2009

Black and white outline flag of Tonga. Red with a bold red cross on a white rectangle in the upper hoist-side…

Color flag of the United States. 13 equal horizontal stripes of red (top and bottom) alternating with white; there is a blue rectangle in the upper hoist-side corner bearing 50 small, white, five-pointed stars arranged in nine offset horizontal rows of six stars (top and bottom) alternating with rows of five stars; the 50 stars represent the 50 states, the 13 stripes represent the 13 original colonies; known as Old Glory; the design and colors have been the basis for a number of other flags, including Chile, Liberia, Malaysia, and Puerto Rico.

Flag of the United States, 2009

Color flag of the United States. 13 equal horizontal stripes of red (top and bottom) alternating with…

Black and white outline flag of the United States. 13 equal horizontal stripes of red (top and bottom) alternating with white; there is a blue rectangle in the upper hoist-side corner bearing 50 small, white, five-pointed stars arranged in nine offset horizontal rows of six stars (top and bottom) alternating with rows of five stars; the 50 stars represent the 50 states, the 13 stripes represent the 13 original colonies; known as Old Glory; the design and colors have been the basis for a number of other flags, including Chile, Liberia, Malaysia, and Puerto Rico

Flag of the United States, 2009

Black and white outline flag of the United States. 13 equal horizontal stripes of red (top and bottom)…

An illustration of a rectangle shaped steel magnet with "consequent poles at a and b." -Century, 1889

Rectangle Shaped Steel Magnet

An illustration of a rectangle shaped steel magnet with "consequent poles at a and b." -Century, 1889

Solutions for silhouette outlines of shapes (rectangle, parallelogram, isosceles triangle, double arrow, rhombus, hexagon) made from tangram pieces. Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. 7 figures consisting of triangles, squares, and parallelograms are used to construct the given shapes.

Shapes Silhouette Solution Tangram Card

Solutions for silhouette outlines of shapes (rectangle, parallelogram, isosceles triangle, double arrow,…

The illustration of a rectangular pyramid unfolded by creating edges equal length to the base and meeting at point E.

Development of Rectangular Pyramid

The illustration of a rectangular pyramid unfolded by creating edges equal length to the base and meeting…

A postage stamp is adhesive paper evidence of a fee paid for postal services. Usually a small rectangle attached to an envelope, the stamp signifies the person sending it has fully or partly paid for delivery.

Fish Design Postage Stamp

A postage stamp is adhesive paper evidence of a fee paid for postal services. Usually a small rectangle…