Question

Two angles of a right angled triangle add up to 120° . Find all the three angles .

Answer 1

out of 120 one will be 90 so other is 30 and the remaining is 180-120=60



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Answer 2

Let a triangle ABC in which angleA is 90°.let angle A+angleB=120°
angle A+a angle B+angle C= 180°
120°+angle C= 180°
angle C=180°-120°
60°
angle A+angleB=120°
90°+angle B=120°
angle B=120°-90°
=30°
Hence, angle A=90°
angle B=30°
angle C=60°