We know that if sum of 2 interior angle of a triangle then it is equal to 1 exterior angle prove it

We know that if sum of 2 interior angle of a triangle then it is equal

1.	We know that if sum of 2 interior angle of a triangle then it is equal to 1 exterior angle prove it
Answer» Can you tell me about role of woman in Russian revolution Let exterior angel A and other 3 angel of the triangle x,y,z so z and A form linear pair and x+y+z = 180 ( angle sum property)A+z=180( linear pair)And equate it nowx+y+z=z+Az is canceled x+y=Aproved sum of the 2 interior angles equals to 1 exterior angle.