In most countries, gasoline is measured in liters. The volume of one liter is approximately one quart. There are four quarts in one gallon. In Europe, gasoline costs $1.86/liter. How does this price compare with the cost of gasoline in the United States?

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.