# How do you find the area of a triangle with a=7, b=9, c=12?

$6.55$
You can use the formula $\frac{1}{2} a b \sin C$ to calculate the area of a triangle.
$\frac{1}{2} \cdot 7 \cdot 9 \cdot \sin 12$
= $6.55 \Rightarrow$ (correct to 3 s.f)