# Mathematics: how to determine the perimeter of a triangle?

In geometry, one of the skills that often annoys learners is determining surface areas. Many learners have difficulty determining areas and perimeters because the applications are condensed. In order to help young people demystify mathematics, we have identified in this article an easy approach to determining the perimeter of a triangle.

## Triangles and its different shapes of triangles

By definition, a triangle is a geometric figure formed by three segments connected to each other by points. In other words, a triangle is formed by three points connected to each other by segments which form what is called side. Thus defined, we distinguish several forms of triangles. There is the arbitrary triangle with three sides of different lengths, the isosceles triangle with two sides of the same length. There is also the equilateral triangle, whose three sides have the same length and the right triangle whose sides are different lengths and two form a right angle. To determine the perimeter of a triangle, whatever its nature, the calculation formula remains the same.

## How to calculate the perimeter of a triangle?

Calculating the perimeter of a triangle is not that complicated. It is obtained on the basis of a very simple and applied calculation formula. In fact, the perimeter of a triangle by definition is the sum of the dimensions of the segments that made it up. In other words, the perimeter is calculated by adding the measure of its segments; that is to say, it is obtained from the sum of the lengths of the three sides of a triangle.

In a practical way, let us consider a rectangular triangle ABC in B. The length of the segments AB = 5m ; BC = 8m and AC = 20m. To determine the perimeter of this triangle, it is up to you to add up the lengths of the three sides. In other words: P (ABC) = AB + AC + BC = 5 + 8 + 20 = 33m

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