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# Calculate The Perimeter Of A Triangle

Last updated: Saturday, June 24, 2023
Select a type of triangle below
Basic
Right Triangle
Equilateral Triangle
Isosceles Triangle
Obtuse Triangle
Acute Triangle

The perimeter of a triangle is the sum of the lengths of its three sides. It is an important measurement that is used in a variety of applications, such as construction, engineering, and geometry.

The perimeter of a triangle can also be used to calculate other properties of the triangle, such as its area and the lengths of its angles. It is a fundamental concept in geometry and is used extensively in mathematics and science.

The formula for determining the perimeter of a triangle regardless of its shape is defined as:
$$P$$ $$=$$ $$AB$$ $$+$$ $$BC$$ $$+$$ $$AC$$
$$P$$: the perimeter of the triangle
$$AB$$: the length between point A and B
$$BC$$: the length between point B and C
$$AC$$: the length between point A and C
The SI unit of perimeter is: $$meter\text{ }(m)$$
Select a problem below
Find $$P$$
Find $$BC$$

## Find $$P$$

Use this calculator to determine the perimeter of a triangle when the lengths of all three sides are given, regardless of its type.
Hold & Drag
CLOSE
the length between point A and B
$$AB$$
$$meter$$
the length between point B and C
$$BC$$
$$meter$$
the length between point A and C
$$AC$$
$$meter$$
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