Question

Prove that sum of all the angles of a triangle is 1800

Answer 1

Answer:

it's actually 180 degree

Step-by-step explanation:

when you sum all 3 sides the ans will be 180

Answer 2

Sum of all the angles of triangle = 180°

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]