Question

prove that the sum of a triangle is 180degree correct answer will be brainliest

Answer 1

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Answer 2

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To prove :- Sum of angles of a triangle is 180°

Proof :- angle 4 + angle 3 + angle 5 = 180° (linear pair of angles)--------(1)

angle 4 = angle 2 (alternate angles)

angle 5 = angle 1 (alternate angles)

Subsituting angle 4 and angle 5 in (1), we get:-

angle 2 + angle 1 + angle 3 = 180° (angle 4 = angle 2 and angle 5 = angle 1)

angle 1 + angle 2 + angle 3 = 180°

P + Q + R = 180°

Hence, proved.

Hope it helps u