Kevin and Kenneth each earn $135 a month as a salary. They earn a commission for each sale they make, and the ratio of Kevin and Kenneth’s commission is 3:4. If they sell products worth $610 each in March, and Kevin earns a 12% commission, how much money did each of them earn?

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.