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the second angle is half of first angle =40°
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~~ here is ur ans mate hope it helps ~~
one of the angle is given as 80
second angle is half of i.e 80/2=40
now we know two angles are 80 and 40
we know that all the angles add up to 180 degrees
then
let the third angle be x
then the equation
80 + 40+x =180
120 +x =180
x =180-120
x. =60
now we know three angles are 80,40,60
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