RS Aggarwal Solutions for Class 7 Chapter 16 “Congruence”, When two triangles are congruent they will have the same three sides and the same three angles. The equal sides and angles may not be in the same position (if there is a turn or a flip), but they are there. Every figure has a shape, size and a position. If we are given two figures then by simply looking at them carefully, we can decide whether they are of the same shape or not. Related topics that we discuss in this chapter are types of congruent figures, congruence of triangles, congruence and area.