Section A.4 Radians, Arcs and Sectors
¶For a circle of radius \(r\) and angle of \(\theta\) radians:
- Arc length \(L(\theta) = r \theta\text{.}\)
- Area of sector \(A(\theta) = \frac{\theta}{2} r^2\text{.}\)
Joel Feldman, Andrew Rechnitzer, Elyse Yeager
For a circle of radius \(r\) and angle of \(\theta\) radians: