Area of a Polygon (Grade 10 NSC Matric Mathematics): Flashcards

Amount of 2D space within boundary of flat shape

Square units (cm², m², km²)

$s^2$ where $s$ = side length

$b \times h$ where $b$ = base, $h$ = height

$\frac{1}{2}b \times h$ where $b$ = base, $h$ = perp. height

$\frac{1}{2}(a + b) \times h$ where $a$, $b$ = parallel sides

$b \times h$ where $b$ = base, $h$ = perp. height

$\pi r^2$ where $r$ = radius

Height must be perpendicular (90°) to the base

≈ 0.01 km²