In similar figures, the sides opposite the angles that have the same measure.
- In the figure below, triangles ABC and A’B’C’ are congruent; sides AB and A’B’ are corresponding.
- In the figure below, quadrilaterals ABCD and EFGH are similar; sides AB and EF are corresponding.
In congruent figures, the corresponding sides are congruent.
In similar figures, the corresponding sides are proportional in length..