Area of a triangle - "side angle side" (SAS) method

where a,b are the two known sides and C is the
included angle.

Try this Drag the orange dots on each
vertex
to reshape the triangle. The formula shown will recalculate the area using this method.

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.