Area of Circles and Sectors (HSC SSCE Mathematics Standard): Quizzes

$A = \pi r^2$

A ring shape

Radius of the outer circle

$63$ cm²

A slice like pizza

$A = \frac{\theta}{360}\pi r^2$

Fraction of the full circle

$180°$

$A = \frac{1}{4}\pi r^2$

$1.9$ cm²