Question

1)what is the measure of each exterior angle of an equilateral triangle ?

Answer 1

we know that in an equilateral triangle all angles are of 60 degree so when we extend a line of triangle ABC to line segment d so we will get another point in exterior of equilateral triangle this forms the linear pair and that angle so we know that linear prepare is type of Sir supplementary angle so if one side is 60 degree so other side will be angle d + 60 degree is equal to 180 degree so angle d is equal to 180 degree minus 60 degree so we will get on Sir 120 degree HD exterior angle of triangle ABC and LV know that all angles are equal in equilateral triangle are equal exterior angles should be 120 degree thank you