 # Triangle Calculator

Enter the Length of Side ‘a‘ = units

Enter the Length of Side ‘b‘ = units

Enter the Angle ‘A‘ =

The Length of Side ‘c‘ = units

Angle B =

Angle C =

Perimeter of the Triangle = units

Area of the Triangle = square units

Triangle Calculator is a free online tool that displays the area and the perimeter of a triangle. BYJU’S online triangle calculator tool makes the calculation faster, and it displays the perimeter and area in a fraction of seconds.

## How to Use the Triangle Calculator?

The procedure to use the triangle calculator is as follows:

Step 1: Enter the two side lengths and angle in the respective input field

Step 2: Now click the button “Calculate Triangle” to get the area and perimeter

Step 3: Finally, the area and the perimeter of a triangle will be displayed in the output field

### What is Meant by Triangle?

In mathematics, the triangle is a closed two-dimensional plane figure. It is a polygon with three sides and three angles. The sum of the interior angles of the triangle is equal to 180 degrees. Based on the measurements of angles and sides, the triangle can be classified into different types. Based on the sides, the classification of triangles is:

• Scalene triangle
• Isosceles triangle
• Equilateral triangle

Based on the angles, the classification of triangles is:

• Acute angle triangle
• Obtuse angle triangle
• Right angle triangle

The formula to calculate the area and the perimeter of a triangle is given below:

Area of triangle, A = (½) bh square units

The perimeter of a triangle, P = a + b+ c units

Where

a, b, c are the sides of a triangle

b is the base

h is the height