An electronics company is planning to introduce a new line of computers. For the first year, the fixed costs for setting up the production line are $20,000. The variable costs for producing each computer are $40. The revenue from each computer is $65

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.