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Trigonometry Area of a triangle.

STS

New member
Mar 19, 2019
5
ABC is a triangle. AC=4cm; AB=3cm; A=60 degrees.
I need help finding the area of triangle ABC.
 

MathProfessor

New member
Mar 23, 2019
5
Can you calculate the height from point C ?
 

MarkFL

Administrator
Staff member
Feb 24, 2012
13,736
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?