Question

The side of an equilateral triangle is 5.7 cm. Find its perimeter

Answer 1

Answer:

17.1 cm

Step-by-step explanation:

perimeter of equilateral triangle = 3(side of equilateral triangle)

perimeter = 3(5.7) cm

perimeter = 17.1 cm

Answer 2

Given :

• Side of equilateral triangle = 5.7 cm

To Find :

• Perimeter of equilateral triangle

Solution :

Perimeter of equilateral triangle = 3a

➨ 3 x 5.7

➨ 17.1 cm

Perimeter of triangle is 17.1 cm

Other Formulas :

Area of equilateral triangle

• a² * √3/4

Area of triangle by Heron's formula

• √ [ s ( s - a ) + ( s - b ) + ( s - c )

• s = ( a + b + c ) / 2