What expression can be used to add 7/10 + 13/20

Which shows the image of rectangle abcd after the rotation (x, y) → (–y, x)?

Adriveway is 40 yards long about how many meters long is it

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.