Two polygons are congruent if a rigid motion maps one onto the other with corresponding vertices matched. Equivalently, their corresponding sides and corresponding angles are equal. Congruent polygons have equal perimeters and equal areas. They are similar polygons with similarity ratio 1.
Congruent Polygons
See also
Congruent, Congruent Triangles, Geometric Congruence, Similar Polygons, Similarity RatioExplore with Wolfram|Alpha
References
Coxeter, H. S. M. and Greitzer, S. L. Geometry Revisited. Washington, DC: Math. Assoc. Amer., 1967.Cite this as:
Weisstein, Eric W. "Congruent Polygons." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/CongruentPolygons.html