Use this Inner Radius of Annulus Calculator to quickly determine the inner radius using the annulus inner radius formula and understand how to find inner radius of annulus.
This annulus inner radius formula is used in any annulus radius calculator to compute the missing inner radius.
| Outer Radius (R) | Area (A) | Inner Radius (r) |
|---|---|---|
| 10 | 200 | 8.408964 |
| 8 | 100 | 6.658330 |
| 12 | 300 | 10.030630 |
| 15 | 500 | 12.905375 |
| 20 | 800 | 17.888544 |
To understand how to find inner radius of annulus, follow these steps:
1. Square the outer radius.
2. Divide the area by π.
3. Subtract the result.
4. Take the square root.
This is the standard approach used in any annulus radius calculator.
This Inner Radius of Annulus Calculator uses the correct annulus inner radius formula to deliver fast and accurate results.
It provides precision up to six decimal places and helps users quickly understand how to find inner radius of annulus in geometry problems.
• An annulus is the region between two concentric circles.
• It appears in engineering, physics, and architecture.
• The area depends on both inner and outer radii.
• Annulus shapes are used in washers and rings.
• The formula is derived from subtracting two circle areas.