The Area of a Triangle (VCE SSCE General Mathematics): Flashcards

$\text{Area} = \frac{1}{2} \times b \times h$

When base and perpendicular height are known

Must be perpendicular to the base

$\frac{1}{2}bc \sin A$ (or other variations)

Two sides and angle between them known (SAS)

$\sqrt{s(s-a)(s-b)(s-c)}$

$s = \frac{1}{2}(a + b + c)$

All three sides known, no angles or heights (SSS)

Degree mode

Angle A between sides b and c