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Types of Triangles Based on Angles

In a ∆ABC, if...

Question

In a ∆ABC, if ∠A = 72° and ∠B = 63°, find ∠C.

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Solution

Sum of the angles of a triangle is 180°.

$∴ ∠ A + ∠ B + ∠ C = 180 ° 72 ° + 63 ° + ∠ C = 180 ° ∠ C = 45 °$

Hence, ∠C measures 45°.

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