one of the exterior angles of a triangle is 125 degree and the interior opposite angle are in the ratio 2 ratio 3 find angle of a triangle
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125∘=∠A+∠B
(using exterior angle sum property)
125=2X+3X
125=2X+3X125=5X
125=2X+3X125=5XX=25∘,
2X=50,
3X=75
3X=75third angle = 180−125=55∘
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