Selina Concise Class 6 Math Chapter 25 Quadrilateral Exercise 25A Solution EXERCISE 25A (1) Let the other equal angles measure be xo and xo. We know that, sum of four angle of a quadrilateral = 360o. Then, x + x + 89 + 113 = 360 ⇒ 2x + 202 = 360 ⇒ 2x = […]