# Area of Triangle Using Sine Formula

## Area of a Triangle Formula

Online calculator to calculate the area of a triangle given its two sides a and b and the included angle.

The above triangle has angles A, B and C and the respective opposite sides a, b and c.

The area Area of a triangle given two of its sides and the angle they make is given by one of these 3 formulas:

## How to use the calculator

Here we assume that we are given sides a and b and the angle between them C. Enter sides a and b and angle C in degrees as positive real numbers and press "enter". The output is the area of the triangle.