Prove sums of angles in a triangle is 180 degree

because a triangle has 3 sides and has 3 angles

so each angle on a equilateral triangle has 60 degrees which means

60 x 3 = 180

Step-by-step explanation:

because a triangle has 3 sides and has 3 angles

so each angle on a equilateral triangle has 60 degrees which means

60 x 3 = 180