Please answer now this is a big test

which description best fits the group

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

Measures of the angle of r, 31 s (x+4) t (3x+9)

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.