How to prove triangle is 180.

1.	How to prove triangle is 180.
Answer» By drawing a parellel line with upper point of triangle parallel to the base. And showing the two base angle of triangle equal to two side-angle of the straight line due to alternative angle theorem. And at last as the sum of all angle on a straight line ia 180 do sum of all angle of triangle will same because all angle of triangle is equal to all angle on straight line.

Discussion