This circle sector perimeter reference table shows the sector perimeter for a range of radius values, assuming a central angle of 90 degrees. Every figure is computed with the same engine that powers our Circle Sector Perimeter Calculator, so the numbers are exact.
| Radius | Sector perimeter | Arc length |
|---|---|---|
| 1.3 | 4.6420 | 2.0420 |
| 2.5 | 8.9270 | 3.9270 |
| 3.8 | 13.5690 | 5.9690 |
| 5 | 17.8540 | 7.8540 |
| 7.5 | 26.7810 | 11.7810 |
| 10 | 35.7080 | 15.7080 |
| 15 | 53.5619 | 23.5619 |
| 25 | 89.2699 | 39.2699 |
| 35 | 124.9779 | 54.9779 |
| 50 | 178.5398 | 78.5398 |
How to use this table
Find the row closest to your radius and read across to the sector perimeter. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Circle Sector Perimeter Calculator for a precise answer.
Need a value that is not in the table? — the Circle Sector Perimeter Calculator does it instantly, for free, with the formula and a worked example built in.
Related calculators
Continue exploring math calculators with these tools: Margin of Error Calculator, Sample Size Calculator, Confidence Interval Calculator, Coefficient of Variation Calculator, Regular Heptagon Area Calculator.