Your friend bob makes a triangle out of a pen, a pencil, a small ruler. using the same three school supplies, you try to make a different triangle, but find that you cannot. the triangle that you made and the one bob made are congruent by the (sas, sss, aaa, ssa) postulate. as a result, (all of the corresponding angles are congruent, all of the corresponding sides are congruent, all of the corresponding sides and corresponding angles are congruent) by cpctc.