The Basics (Leaving Cert Mathematics): Flashcards

$\frac{1}{2} \times \text{base} \times \text{height}$

Perpendicular distance from opposite vertex to base

$\frac{1}{2} \times a \times b \times \sin(C)$

Two sides of the triangle

Angle between the two sides

Two sides and included angle known

Height given or easily determined

$30 \text{ cm}^2$

$\frac{\sqrt{3}}{2}$

Yes, select any side of triangle