Question

prove that the sum of the triangle is 180 degree

Answer 1

proving that the sum of the measure of a triangle is 180 degrees. The Alternate Interior Angles Theorem and the measure of a straight angle is used to prove the proposition that sum of the measure of a triangle is 180 degrees

Answer 2

LET ALL ANGLES OF TRI.. BE 'x'.                                       ----------(1)

LET SUM OF ALL ANGLES OF TRI BE 180 IS TRUE.        ----------(2)

WE ALL KNOW THAT EACH ANGLE OF EQUILATERAL TRI  IS 60. ---------(3)

SO x+x+x=180

      3x=180

      x=60

hence proved.

PLZ MARK AS BRAINLIEST.