the angle of a quadrilateral are x ,(x-10) (x-30) and (2x) .find the value of the greatest angle?
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we know that sum of interior angles of a quadrilateral is equal to 360°
=> x + x-10 + x-30 + 2x =360
=> 5x -40 = 360°
=> 5x = 360+40
=> 5x = 400
=> x= 400/5
=> x= 80
greatest angle is 2x
= 2x 80
= 160°
=> x + x-10 + x-30 + 2x =360
=> 5x -40 = 360°
=> 5x = 360+40
=> 5x = 400
=> x= 400/5
=> x= 80
greatest angle is 2x
= 2x 80
= 160°
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