Given the relation R = {(−2, 3), (b, 4), (1, 9), (0, 7)}, what value for b would make this relation NOT a function. A.8
B.3
C.4
D.0

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.