Question

the side of an equilateral triangle is 11.5 cm.find its perimeter

Answer 1

perimeter of equilateral triangle=3×side
=3×11.5=34.5cm

Answer 2

side = 11.5 cm

we know that

perimeter of equilateral triangle = 3 × side

= 11.5 × 3

= 34.5 cm

so perimeter of equilateral triangle is 34.5 cm