The following is the formula to find the area of a circle. Which shows the formula correctly solved for the radius (r) in terms of the area (A)? A = pi r^2 A. r = (square root symbol) a pi
B. r = a pi/2
C. r = (square root symbol) a/pi
D. r = a/2 pi

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.