› having the same size and shape, or matching in size and shape: congruent figures Congruent angles geometry › Congruent angles are angles that have the same degree measurement. Congruent circles geometry › Congruent circles are circles that have the same radius (= measurement from the center to the edge). Congruent polygons geometry › Congruent polygons are polygons (= flat shapes with three or more sides) in which the matching sides are the same length and the angles have the same degree measurements. Congruent segments geometry › Congruent segments are segments (= parts of a line) that are the same length. Congruent triangles geometry › Congruent triangles are triangles that match one of these conditions: all three sides have the same length; two sides and the included angle are the same; two angles and the included side are the same; or two angles and the side opposite one of them are the same as those parts of the other triangle. congruence /kənˈɡru·əns, ˈkɑŋˌɡru·əns/ noun [U] geometry

(Definition of congruent adjective from the Cambridge Academic Content Dictionary
© Cambridge University Press)

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