Perimeter of a triangle
The perimeter of a triangle is the distance around it, which is the sum of the lengths of its sides. The formula for the perimeter of a triangle is:
Perimeter = a + b + c
where a, b, and c are the lengths of the three sides of the triangle.
Isosceles triangles, equilateral triangles, and right triangles have a number of relationships that allow us to find their perimeters without necessarily knowing all of their side lengths. Below are the formulas for the perimeters of these triangle types.
Perimeter = 2 × l + b
Where l is the side length and b is the base length.
Perimeter = 3 × s
Where s is the side length
You can use the Pythagorean Theorem to find the perimeter of a right triangle if you know, or can determine, the lengths of at least two sides from the given information.
Referencing the triangle above:
If a and b are given,
If a and c are given,
If b and c are given,
What is the perimeter of a triangle with a hypotenuse c = 26, and a side length a = 10?
|=||10 + 26 + 24|