yhdenmukukaisiin
Yhdenmukukaisiin is the illative plural form of the Finnish adjective yhdenmukainen, used in mathematical Finnish to describe objects that are congruent. In geometry, congruent figures have the same shape and size, and one can be mapped onto the other by a rigid motion.
Two figures are yhdenmukaiset (congruent) if there exists an isometry—such as a translation, rotation, or reflection
In the plane, congruence is commonly tested for triangles using criteria such as SSS (three sides), SAS
Congruence is distinct from similarity. Similar figures have the same shape but not necessarily the same size;
See also: isometry, congruence transformation, rigidity, similarity, Euclidean geometry.