Length of an Arc and Area of a Sector (VCE SSCE General Mathematics): Flashcards

A curved section of a circle's circumference

$s = \frac{\pi r\theta}{180}$

A wedge-shaped region of a circle with two radii and an arc

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

The smaller region when a circle is divided by two radii

The larger region when a circle is divided by two radii

$360° - \theta$

180

360

cm (linear units)