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Question
Find the unknown marked angles in the given figure:
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Solution
In the figure,
∠A + ∠B + ∠C = 180° .....(Sum of angles of a triangle)
x° + 90° + x° = 180°
⇒ 2x°+ 90° = 180°
⇒ 2x° = 180° − 90°
⇒ 2x°= 90°
⇒ x° = `(90° )/2=45° `
Hence ∠A = x° = 45°
and ∠C = x° = 45°
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