Question

an exterior angle of triangle is 120 degree and one of its interior opposite angle is equal to 40 degree then find other two angles of triangle

Answer 1

answer in photo. okay cheers!!!!!!!

Answer 2

HEY......

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THIS IS THE PROPERTY OF A TRIANGLE .....

THE EXTERIOR ANGLE OF A TRIANGLE IS THE SUM OF ITS INTERIOR OPPOSITE ANGLES......

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SO DUE TO THIS PROPERTY AND GIVEN INFO......

120 = 40 + X

X=120-40

X=80

SO THE SECOND ANGLE IS 80 .....

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THE SUM OF THE MEASURE OF THREE ANGLES OF TRIANGLE IS 180....

SO 40+80+X=180

120+X=180

X=180-120

X=60

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SO THE THREE ANGLES ARE .....

80,60,40

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