Mathematics, 21.06.2019 22:10
Given: ae â
ce ; de â
be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that âłaeb â
âłced, we can show that âł â
âłceb by. so, â cad â
â by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.
Answers: 1