answer:
the total angle of a triangle is 180°
since all of the sides of the triangle are even, then it means that all the angles are also equal
180 divided by 3 (because theres 3 angles) = 60
since one of the interior angle of the triangle is 60, the congruent angle of x also equals to 60° and also 60+60+60=180 (straight line)
i made a little diagram above for you, i hope it helps you and goodluck!! :)
