A student has two square pyramids. The second square pyramid has base side lengths that are twice that of the first pyramid.
The formula for the volume V of a pyramid with base area B and height h is V=
13Bh. How many times greater is the volume of the second pyramid than the volume of the first pyramid?

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.