Write an algebraic expression for the situation: 2.5 less than a number d A. d - 2.5
B. 2.5 - d
C. 2.5 ÷ d
D. d ÷ 2.5

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.