a park in a subdivision is triangular-shaped. two adjacent sides of the park are 537 feet and 523 feet. the angle between the sides is 74 degrees. to the nearest unit, find the area of the park in square yards.

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.