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`"Triangle"_"(perimeter)" = A + B + C `

Enter a value for all fields

The **Perimeter of a Triangle** calculator computes the perimeter of a triangle.** **

**INSTRUCTIONS:** Choose units and enter the following:

- (
**A**) Side A - (
**B**) Side B - (
**C**) Side C

**Perimeter of Triangle (P):**. The calculator returns perimeter in meters. However, the answer can be automatically converted to compatible unit via the pull down menu.

The formula for the perimeter of a triangle is:

P = A + B + C

where:

- P = Perimeter of Triangle
- A = Side A
- B = Side B
- C = Side C

A **triangle** is a polygon with three sides, three vertices (corners), and three angles. **Triangles **can be classified based on the lengths of their sides and the measures of their angles as follows:

By Side Lengths:

**Equilateral Triangle**: All three sides are equal in length.**Isosceles Triangle**: Two sides are equal in length.**Scalene Triangle**: All three sides have different lengths.

By Angle Measures:

**Acute Triangle**: All three angles are less than 90 degrees.**Right Triangle**: One angle is exactly 90 degrees.**Obtuse Triangle**: One angle is greater than 90 degrees.

The sum of the interior angles of any triangle always adds up to 180 degrees.

- Area of Triangle (base and height)
- Area of Triangle (two sides and interior angle)
- Area of Triangle (two angles and interior side)
- Area of Triangle (three sides)
- Area of Equilateral Triangle
- Area of Triangle (three points)
- Height of Triangle
- Width of Triangle
- Triangle Perimeter
- Interior Angle of a triangle based on the length of three sides
- Semi-perimeter of a triangle
- Area of Circle Within a Triangle
- Area of Circle Around a Triangle
- Area between two vectors
- Triangle Volume