Question

the sum of 2 angles of a triangle is equal to its third angle. prove thal triangle is right angle.

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Answer 1

HERE'S YOUR ANSWER

Consider △ABC,

Then according to the given condition, ∠A=∠B+∠C

Sum of all the interior angles of the triangle is 180 °

Hence, ∠A+∠B+∠C=180°

2∠A=180°

⇒∠A=90°

HOPE IT HEPLS