George's collection has 4 times as many shells in it as Ricardo's collection. Together, they have 40 shells. How many shells are in George's collection? How many shells are in Ricardo's collection?
Select the person with more shells:

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.