Question

Calcula el área y el perímetro de un triángulo equilátero de 18cm de lado.

Answer 1

The area and perimeter of an equilateral triangle with sides 18 cm are;

Area = 140.30
`cm^2`

Perimeter = 54 cm.

In Mathematics and Geometry, the area of an equilateral triangle can be calculated by using this formula:

Area of an equilateral triangle, A =
`(√(3) )/(4) * a^2`

Where:

a represent the side lengths of an equilateral triangle.

By substituting the given parameters or dimensions into the formula for the area of an equilateral triangle, we have the following;

Area of an equilateral triangle, A =
`(√(3) )/(4) * 18^2`

Area of an equilateral triangle, A = 140.30
`cm^2`

For the perimeter, we have;

Perimeter of an equilateral triangle, P = 3a

Perimeter of an equilateral triangle, P = 3(18)

Perimeter of an equilateral triangle, P = 54 cm.

Complete Question:

Calculate the area and perimeter of an equilateral triangle with sides 18cm.