. ीध जपप्तु पकद रे ० 1294 मूडo3 L %

1.	. ीध जपप्तु पकद रे ० 1294 मूडo3 L % 2o ,.'¥ q . ;-
Answer» In order to prove that the sum of angles of a triangle is 180, you must know the theorems of angles of a triangle. We know that, alternate interior angles are of equal magnitude. This'll help us get the answer. Let us assume a triangle ABC. Now we have to substitute the angles. ∠PAB + ∠BAC + ∠CAQ = 180°. where PQ line parallel to side BC touching vertex A. ∠PAB = ∠ABC & ∠CAQ = ∠ACB BECAUSE alternate interior angles are congruent.. Hence we get, ∠ABC + ∠BAC + ∠ACB = 180° [Proved]

. ीध जपप्तु पकद रे ० 1294 मूडo3 L % 2o ,.'¥ q . ;-

Answer»

In order to prove that the sum of angles of a triangle is 180, you must know the theorems of angles of a triangle.

We know that, alternate interior angles are of equal magnitude.

This'll help us get the answer. Let us assume a triangle ABC. Now we have to substitute the angles.

∠PAB + ∠BAC + ∠CAQ = 180°. where PQ line parallel to side BC touching vertex A.

∠PAB = ∠ABC & ∠CAQ = ∠ACB BECAUSE alternate interior angles are congruent..

Hence we get, ∠ABC + ∠BAC + ∠ACB = 180° [Proved]