Use this circle sector area calculator to quickly calculate sector area from radius and central angle. Perfect for sector area formula tasks.
A = sector area
r = radius of the circle
θ = central angle in degrees
π ≈ 3.14159
| Radius | Angle (°) | Sector Area |
|---|---|---|
| 5 | 90 | 19.634954 |
| 10 | 180 | 157.079633 |
| 3 | 60 | 4.712389 |
| 7 | 120 | 51.836621 |
| 8 | 45 | 25.132741 |
1. Take the radius of the circle.
2. Square the radius and multiply by π.
3. Multiply the result by the fraction of the angle over 360°.
This circle sector area calculator automatically computes results with up to six decimal places. Useful for students, engineers, and designers needing precise calculate sector area results.
• A sector is a portion of a circle bounded by two radii.
• Sector area is proportional to the central angle.
• Used in pie charts, engineering, and design.
• Understanding sectors helps in trigonometry and geometry.
• Sectors are fundamental in circular motion and navigation.