Question

In a triangle ABC, if angle A = 120 degree and angle B 30 degree than what will be the angle C

Answer 1

30°
Because sum of all angles of a ∆ = 180°

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Answer 2

Given : ΔABC

∠A = 120°

∠B = 30°

To Find : ∠C

Solution:

Triangle Angle sum theorem:

Sum of all the angles of a triangle is 180°

Hence in  ΔABC

∠A  + ∠B + ∠C = 180°

∠A = 120°

∠B = 30°

Substitute the values

120° + 30° + ∠C = 180°

=>  150° + ∠C = 180°

=> ∠C = 180° -  150°

=> ∠C = 30°

Hence ∠C = 30°

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