Usually called the "side angle side" method, the area of a triangle is given by the formula below. Although
it uses the trigonometry Sine function, it works on any triangle, not just
right triangles.
*where*

a and b are the lengths of two sides of the triangle

C is the included angle (the angle between the two known sides)

Use the calculator above to calculate the area of a triangle given 2 sides and the angle between them.

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