Semi-Annulus Area Calculator
Precision Note: Results rounded to 4 decimal places for educational reference.
Recent Calculations
Semi-Annulus Area Formula
The area of a semi-annulus (half-ring) is calculated using the formula:
Area = (π × (R² - r²)) / 2
- R = Outer radius of the semi-annulus
- r = Inner radius of the semi-annulus
This formula calculates the area of half the region between two concentric circles, where R is the radius of the outer circle and r is the radius of the inner circle.