the three exterior angle of parallelogram are 80,100 and 120 respectively .find the measure of fourth interior angle
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Rahul11112222333
We know that sum of the angle of all the exterior angle is 360°. so, angle reqd = 360 - (80+100+120) =360-300 = 60° therefore, the fourth ext angle = 60° fourth int angle= 180-60= 120°
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so, angle reqd = 360 - (80+100+120)
=360-300 = 60°
therefore, the fourth ext angle = 60°
fourth int angle= 180-60= 120°