What is the perimeter of an equilateral triangle with a side measuring 27 centimeters?

To find the perimeter of an equilateral triangle, the formula used is the sum of the lengths of all three sides. Since each side of an equilateral triangle is equal, the perimeter can be calculated by multiplying the length of one side by three.

In this case, the side length of the triangle is given as 27 centimeters. Therefore, the calculation is:

Perimeter = 3 × side length

Perimeter = 3 × 27 cm

Perimeter = 81 cm

This calculation shows that the perimeter of the equilateral triangle is 81 centimeters, confirming that this option reflects the correct understanding of how to calculate the perimeter based on the properties of an equilateral triangle. Each side contributes equally to the total perimeter, making the multiplication straightforward and systematic.