HD TV's have a mean price of $826 with a standard deviation of $35. what is the coefficient variation(CV) for the price of HD TVs? a) 23.60%
b) 35%
c) 4.24%
d)7.56%​

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.