<span>The surface of this shape is called a rectangle. </span><span>Opposing sides of the rectangle are of equal length . </span><span>To fully fenced backyard you have to put a fence line the sides of the rectangle. The length of the fence will be equaled total sides of the rectangle. </span>the sum of the sides of the rectangle = <span>perimeter of a rectangle 2a + 2b = P
x + y = 120° (given) x = y - 12 Then, y + y - 12 = 120° (y + y) - 12 = 120° 2y - 12 = 120° 2y = 120 + 12 = 132° y = 132/2 = 66° x = y - 12 = 66 - 12 = 54° There you go :)
