This regular polygon area reference table shows the area for a range of number of sides values, assuming a side length of 10 and an apothem (centre to edge) of 8.66. Every figure is computed with the same engine that powers our Regular Polygon Area Calculator, so the numbers are exact.
| Number of sides | Area | Perimeter |
|---|---|---|
| 3 | 129.9000 | 30.00 |
| 4.5 | 194.8500 | 45.00 |
| 6 | 259.8000 | 60.00 |
| 9 | 389.7000 | 90.00 |
| 12 | 519.6000 | 120.00 |
| 18 | 779.4000 | 180.00 |
| 30 | 1,299.0000 | 300.00 |
| 42 | 1,818.6000 | 420.00 |
| 60 | 2,598.0000 | 600.00 |
How to use this table
Find the row closest to your number of sides and read across to the area. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Regular Polygon Area Calculator for a precise answer.
Need a value that is not in the table? — the Regular Polygon Area Calculator does it instantly, for free, with the formula and a worked example built in.
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