Which dimensions cannot create a triangle?
A-side lengths of 5 ft, 12 ft, and 13 ft
B-side lengths of 2 ft, 11 ft, and 15 ft
C-side lengths of 3 ft, 7 ft, and 11 ft
D-side lengths of 4 ft, 8 ft, and 15 ft
I don't have lot of time

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.