One store sells a ream of paper for $37.25. another store sells the same paper for $32.50. what are your savings at the second store?
a. $5.25
b. $3.75
c. $4.75
d. $4.25

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.