CLASS 9 MATHS CHAPTER-8 QUADRILATERALS
Exercise 8.1 Question 1. The angles of quadrilateral are in the ratio 3 : 5 : 9 : 13. Find all the angles of the quadrilateral. Solution:Let the angles of the quadrilateral be 3x, 5x, 9x and 13x.∴ 3x + 5x + 9x + 13x = 360°[Angle sum property of a quadrilateral]⇒ 30x = 360°⇒ …