H=-16t^2 + vt +k The equation above gives the height h, in feet, of a ball t seconds after it is thrown straight up
with an initial speed of v feet per second from a height of k feet. What is an equation that
shows v in terms of h, t, and k?

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.