ABCD is a quadrilateral.a) Calculate the value of x. A = 2x B = 90 Degrees C = X D = 3x 360 - 90 = 270 270 ÷ 3 = 90 270 ÷ 2 = 135 135 - 90 = 45 x = 45 Degrees ​This is an answer to the question