"Right fore foot of Indian Elephant. U, ulna; R, radius; c, cunelform; l, lunar; sc, scaphold; u, unciform; m, magnum; td, trapezoid; tm, trapezium; I to V, first to fifth digit." —The Encyclopedia Britannica, 1903

Elephant Foot

"Right fore foot of Indian Elephant. U, ulna; R, radius; c, cunelform; l, lunar; sc, scaphold; u, unciform;…

A view of the left scaphoid seen from behind.

Left Scaphoid

A view of the left scaphoid seen from behind.

A view of the left scaphoid seen from in front.

Left Scaphoid

A view of the left scaphoid seen from in front.

The second metacarpal of the left hand.

Metacarpal

The second metacarpal of the left hand.

The third metacarpal of the left hand.

Metacarpal

The third metacarpal of the left hand.

The fourth metacarpal of the left hand.

Metacarpal

The fourth metacarpal of the left hand.

The fifth metacarpal of the left hand.

Metacarpal

The fifth metacarpal of the left hand.

The left os magnum, the outer side seen from below.

Os Magnum

The left os magnum, the outer side seen from below.

One large trapezoid for pattern block set.

Large Trapezoid for Pattern Block Set

One large trapezoid for pattern block set.

Three large trapezoids for pattern block set.

Large Trapezoids for Pattern Block Set

Three large trapezoids for pattern block set.

Three large trapezoids for pattern block set.

Large Trapezoids for Pattern Block Set

Three large trapezoids for pattern block set.

Fourteen small trapezoids for pattern block set.

Small Trapezoids for Pattern Block Set

Fourteen small trapezoids for pattern block set.

Pressure upon an oblique surface. In the image, pressure acts on all sides of the surface equally.

Oblique Surfaces

Pressure upon an oblique surface. In the image, pressure acts on all sides of the surface equally.

The left trapezium as seen from the front.

Trapezium

The left trapezium as seen from the front.

The left trapezium as seen from the above and the mesal side.

Trapezium

The left trapezium as seen from the above and the mesal side.

Illustration of a trapezium, a quadrilateral which has no two sides parallel.

Trapezium

Illustration of a trapezium, a quadrilateral which has no two sides parallel.

Illustration of a trapezium, a quadrilateral having no two sides parallel. The diagonal is labeled in this illustration.

Trapezium

Illustration of a trapezium, a quadrilateral having no two sides parallel. The diagonal is labeled in…

A trapezoid is a quadrilateral having only two of its sides parallel.

Trapezoid

A trapezoid is a quadrilateral having only two of its sides parallel.

The left trapezoid as seen from the above, the inner side, and behind.

Trapezoid

The left trapezoid as seen from the above, the inner side, and behind.

The left trapezoid as seen from the front, below, and outer side.

Trapezoid

The left trapezoid as seen from the front, below, and outer side.

Trapezoid with angles and height labeled.

Trapezoid

Trapezoid with angles and height labeled.

Illustration of a trapezoid, a quadrilateral which has two and only two sides parallel.

Trapezoid

Illustration of a trapezoid, a quadrilateral which has two and only two sides parallel.

Illustrations of a trapezoid.

Trapezoid

Illustrations of a trapezoid.

Illustration of a trapezoid with altitude a and bases b and b' used to demonstrate that the area is 1/2 the sum of the bases multiplied by the altitude.

Area of a Trapezoid

Illustration of a trapezoid with altitude a and bases b and b' used to demonstrate that the area is…

The right trapezoid bone.

Trapezoid Bone

The right trapezoid bone.

Illustration used to prove the theorem "The line bisecting one of the non parallel sides of a trapezoid and parallel to the bases bisects the other of the non parallel sides also."

Line Bisecting Trapezoid Sides

Illustration used to prove the theorem "The line bisecting one of the non parallel sides of a trapezoid…

Trapezoid with dimensions labeled. Trapezoid can be used to calculate area.

Trapezoid With Dimensions

Trapezoid with dimensions labeled. Trapezoid can be used to calculate area.

Illustrations of an isosceles trapezoid with equal diagonals drawn.

Isosceles Trapezoid With Equal Diagonals

Illustrations of an isosceles trapezoid with equal diagonals drawn.

An illustration of a trapezoid with 4 sides and height labeled.

Trapezoid With Labels

An illustration of a trapezoid with 4 sides and height labeled.

Illustrations of a trapezoid with a line joining the midpoints of the diagonals.

Trapezoid With Lines Joining the Midpoints of the Diagonals

Illustrations of a trapezoid with a line joining the midpoints of the diagonals.

Illustrations of a trapezoid with a line segment drawn parallel to one side

Trapezoid With Line Segment Parallel to One Side

Illustrations of a trapezoid with a line segment drawn parallel to one side

Illustrations to show trapezoids with lines joining the midpoints of the sides of any quadrilateral, taken in order.

Trapezoids With Lines Joining Midpoints

Illustrations to show trapezoids with lines joining the midpoints of the sides of any quadrilateral,…

Illustration of a trapezoid, with the median drawn. The median of a trapezoid is parallel to the bases, and is equal to half the sum of the bases.

Trapezoid With Median

Illustration of a trapezoid, with the median drawn. The median of a trapezoid is parallel to the bases,…

Illustrations of a trapezoid with diagonals drawn.

Trapezoid With Diagonals

Illustrations of a trapezoid with diagonals drawn.