Sector Area Calculator
Radius (r)
Angle
Calculates the area of a circular sector (pie-slice shaped region) given radius and angle. A sector is defined by two radii and the arc between them.
- 1Area = (θ/360) × πr² for degrees
- 2Area = ½r²θ for radians
- 3Full circle = 360° = 2π radians
- 4Half circle sector = semicircle
r = 8, θ = 45°=Area = (45/360)×π×64 ≈ 25.13
r = 6, θ = 2 rad=Area = ½×36×2 = 36
| r | θ (°) | Area |
|---|---|---|
| 5 | 90 | 19.63 |
| 8 | 45 | 25.13 |
| 10 | 120 | 104.72 |
| 12 | 60 | 75.40 |
References
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