GeometryProblem 498 Sir SagarJanuary 18, 20150 ABCD is a trapezoid. If AC is equal to 3x – 7 and BD is equal to 2x + 8, find the value of x so that ABCD is isosceles. Solution:- In a isosceles trapezoid each diagonal are equal. 3x – 7 = 2x + 8 x – 7 = 8 x = 15