Who wants 20 what is the value of x? enter your answer in the box. x = rectangle with a hash mark on the top and bottom. the top is labeled 40, and the bottom is labeled 5 x plus 10.

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.