Calcolatore del Cerchio (Avanzato) — Formula
## Circle Calculations
### Formulas
- **Area** = pi × r²
- **Circumference** = 2 × pi × r
- **Sector Area** = pi × r² × (angle / 360)
- **Arc Length** = 2 × pi × r × (angle / 360)
A sector is a "pie slice" of the circle defined by a central angle.
### Formulas
- **Area** = pi × r²
- **Circumference** = 2 × pi × r
- **Sector Area** = pi × r² × (angle / 360)
- **Arc Length** = 2 × pi × r × (angle / 360)
A sector is a "pie slice" of the circle defined by a central angle.
Esempio Risolto
A circle with radius 5, find area and a 90-degree sector.
- Area = pi × 25 ≈ 78.5398
- Circumference = 2 × pi × 5 ≈ 31.4159
- Sector area = 78.5398 × 90/360 ≈ 19.6350
- Arc length = 31.4159 × 90/360 ≈ 7.8540