If the area of a parallelogram is 80 and the height from the long side is 20% of the length of the long side find the perimeter if the length of the short side is 10

Question

If the area of a parallelogram is 80 and the height from the long side is 20% of the length of the long side find the perimeter if the length of the short side is 10

Answer 1

Area = A = hb = height times base = 80= (.2b)b = .2b^2

b^2 = 80/.2 = 800/2= 400

b = sqr400 = 20 = length of the long side