Perimeter is the sum of all the sides of a closed figure.

An equilateral triangle is a triangle having all three sides equal in length.

Perimeter of equilateral triangle is equal to three times the length of a side of a triangle.

**Perimeter of Equilateral Triangle = 3 x Length of each side **

**Question 1**

Find the perimeter of an equilateral triangle of side 9 cm?

**Explanation**

An equilateral triangle is a triangle having all three sides equal in length.

Length of each side of an equilateral triangle = 9 cm

Perimeter of an equilateral triangle = ( 3 x Length of each side ) units

= ( 3 x 9 ) cm

= 27 cm

**Question 2**

Find the perimeter of an equilateral triangle of side 25 cm?

**Explanation**

An equilateral triangle is a triangle having all three sides equal in length.

Length of each side of an equilateral triangle = 25 cm

Perimeter of an equilateral triangle = ( 3 x Length of each side ) units

= ( 3 x 25 ) cm

= 75 cm

**Question 3**

Find the perimeter of an equilateral triangle of side 16 cm?

**Explanation**

An equilateral triangle is a triangle having all three sides equal in length.

Length of each side of an equilateral triangle = 16 cm

Perimeter of an equilateral triangle = ( 3 x Length of each side ) units

= ( 3 x 16 ) cm

= 48 cm

**Question 4**

Find the perimeter of an equilateral triangle of side 4.5 cm?

**Explanation**

An equilateral triangle is a triangle having all three sides equal in length.

Length of each side of an equilateral triangle = 4.5 cm

Perimeter of an equilateral triangle = ( 3 x Length of each side ) units

= ( 3 x 4.5 ) cm

= 13.5 cm

**Question 5**

Find the perimeter of an equilateral triangle of side 7.5 cm?

**Explanation**

An equilateral triangle is a triangle having all three sides equal in length.

Length of each side of an equilateral triangle = 7.5 cm

Perimeter of an equilateral triangle = ( 3 x Length of each side ) units

= ( 3 x 7.5 ) cm

= 22.5 cm