In a baseball drill, Tom is standing 5 feet west of Caleb, and Bobby is standing 12 feet directly south of Caleb. If the baseball is thrown from Tom to Bobby and then from Bobby to Caleb, how many feet did the baseball travel?

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.