1.

If the angles of a quadrilateral are x°,x-20°,x-30°,x+10°, then find x

Answer»

Sum of all angles of an quadrilateral = 360°


=> x + x - 20 + x - 30 + x + 10 = 360


=> 4X - 40 = 360

=> x - 10 = 90

=> x = 100°




Angles are :-

x = 100°
x - 20 = 80°
x - 30 = 70°
x + 10 = 110°




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