HEL PL The surface area of a right square pyramid is 50 square inches. If the sides of the base and the slant height of the pyramid are each multiplied by 4, what is the surface area of the new cone?
A. 800 in.
B. 200 in.
C. 100 in.
D. 54 in.

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.