The length of one side of an equilateral triangle is 6.1 cm. What is its perimeter?

Let’s start the solution by remembering that there is a perimeter of some geometric shape.

So, the perimeter of a geometric figure is the sum of the lengths of all its sides.

That is, to calculate the perimeter of a triangle, we must add the lengths of the three sides of the triangle:

P = a + b + c;

It is known from the condition that the given triangle is equilateral.

That is, the lengths of all three of its sides are equal to each other.

Let’s write down the formula for finding the perimeter:

P = 3a.

It remains to substitute the values and calculate:

P = 3 * 6.1 = 18.3 cm.