Congruent

Definition

Two sides (line segments) are *congruent* if they are the same length.

Two angles are *congruent* if they have the same measure.

Two figures are *congruent* if they have the same shape and size.

Two figures are similar if they have the same shape but not necessarily the same size.

Example 1

These figures are congruent, since they all have the same shape and size.

Video does not play in this browser or device. Please try another device or upgrade your browser.

Example 2

These figures are NOT congruent. Although they are the same shape, they are different sizes. Figures that are the same shape but different in size are similar.

Video does not play in this browser or device. Please try another device or upgrade your browser.

Example 3

These two figures are NOT congruent, since they do not have the same shape.