One of the exterior angle of a triangle is 140 and the opposite angle arie in ratio 3:4 . Find out the measure of the interior angles
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exterior angle= 140 °
opposite interior angle= 3:4
let the interior angle be 3x , 4x
then, 3x + 4x = 140° ( exterior angle is equal to the interior angle of opposite side)
7x= 140°
x= 140°/7
X = 20
we put 20 on every X
3x= 3× 20 = 60
4x = 4× 20 = 80
opposite interior angle= 3:4
let the interior angle be 3x , 4x
then, 3x + 4x = 140° ( exterior angle is equal to the interior angle of opposite side)
7x= 140°
x= 140°/7
X = 20
we put 20 on every X
3x= 3× 20 = 60
4x = 4× 20 = 80
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