Question

4) Prove that the sum of all angles in 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°.

Step-by-step explanation:

Answer 2

Answer:

it is a postulate...

Step-by-step explanation:

you can prove it practically..

by arranging all cones in a point which will form a line.