The qubit is an ancient unit of lenght. while visiting a museum you hear another tourist remark that they are 156 cm tall and fit exactly in the 3 cubit opening in the nearby stone display. use this pair of equivalent measurements to convert 5 cubits to feet.

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.