True or false question please help :)

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

The tile along the edge of a triangular community pool needs to be replaced? ?

Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.