Respuesta :
the perimeter of a triangle is the sum of its 3 sides, also, for a equilateral triangle, its sides are equal by definition, so if we call the side length of the triangle x, then we have:
x + x + x = 15
3x = 15
then we divide both sides of the equation by 3
x = 15/3
x = 5
therefore each side of the triangle is 5 cm
x + x + x = 15
3x = 15
then we divide both sides of the equation by 3
x = 15/3
x = 5
therefore each side of the triangle is 5 cm
The answer is 5 because a triangke has 3 sides sp u do 15/ 3 which is 5
