Pythagoras’ Theorem, Perimeter, and Area (HSC SSCE Mathematics Standard): Flashcards

$h^2 = a^2 + b^2$

Longest side, opposite the right angle

Total distance around the outer boundary of a shape

Circumference

$P = 2(l + b)$

$C = 2\pi r$

Amount of surface enclosed within boundaries of a shape

$A = \frac{1}{2}bh$

$A = \pi r^2$

Has one pair of parallel sides