# TrigonometryArea of a triangle.

#### STS

##### New member
ABC is a triangle. AC=4cm; AB=3cm; A=60 degrees.
I need help finding the area of triangle ABC.

#### MathProfessor

##### New member
Can you calculate the height from point C ?

#### MarkFL

##### Pessimist Singularitarian
Staff member
If you know the lengths of two sides of a triangle (we'll call them $$a$$ and $$b$$), and the angle $$\theta$$ subtended by the two sides, then the area $$A$$ of the triangle is given by:

$$\displaystyle A=\frac{1}{2}ab\sin(\theta)$$

Can you proceed?