Geometry
Circular Sector Area
Area of a sector with central angle θ (deg).
Formula
Formula
A = ½ r2 θ_rad
Variables
| Symbol | Definition | Type & range | Units | Role |
|---|---|---|---|---|
| r | radius | real number (ℝ) | — | input |
| θ | angle in degrees | computed result | — | result |
Try it yourself
Interactive calculator
Worked examples
Example 1
Givenradius r = 5, angle θ (deg) = 90
Result19.63495408
Example 2
Givenradius r = 3, angle θ (deg) = 60
Result4.71238898