Geometric Twins
Two shapes that fit exactly on top of each other are called congruent, and triangles have special shortcuts for checking this fit. The NCERT Mathematics textbook for Class 7 devotes a full discussion to congruence of triangles, where you learn that matching sides and angles need not all be measured. The criteria SSS, SAS, ASA and RHS let you conclude congruence from just three matching parts. You will apply these tests to solve problems and support simple constructions, building the careful reasoning that geometry demands.
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