Team #NoExcuses ran 15 3/4 miles in 3 hours. How many miles did they ran per hour?

Find the missing dimension extra points

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.

Which of the following represents the length of a diagonal of this trapezoid?