6. People have different views on how much tax Americans should pay based on the money they make at work. However, this type of tax is due every
year on April 15%, and everyone who has a job must pay it. Which type of
tax is it?

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.