To earn a B in her algebra course you must achieve an ungrounded test average between 84 and 86 inclusive you scored 86 8085 and 80 on the first three test of the marking. What possible scores can you earn on the fourth and final test to earn a B in the course right down a compound in a quality to solve

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.