The measure of exterior angle of a triangle is 1200. The two interior opposite angles are
In the ratio 2 : 4. Find the value of interior angles.
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Exterior angle=120°
two opposite interior nagle=exterior angle
ratio of angle =2:4
let the angles be 2x and 4x
•°•2x+4x=120°
6x=120°
x=120°/6
x=20°
•°•Now the two angles are 2x=2×20=40°
and 4x=4×20=80°
•°•ANGLES ARE 40°&80°
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