Question

9. Prove that "The sun of all interior angles of a triangle is 180°​

Answer 1

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. ... Now we have to substitute the angles. ∠PAB + ∠BAC + ∠CAQ = 180°