This isosceles triangle perimeter reference table shows the perimeter for a range of equal side length values, assuming a base length of 6. Every figure is computed with the same engine that powers our Isosceles Triangle Perimeter Calculator, so the numbers are exact.
| Equal side length | Perimeter |
|---|---|
| 1.3 | 8.6000 |
| 2.5 | 11.0000 |
| 3.8 | 13.6000 |
| 5 | 16.0000 |
| 7.5 | 21.0000 |
| 10 | 26.0000 |
| 15 | 36.0000 |
| 25 | 56.0000 |
| 35 | 76.0000 |
| 50 | 106.0000 |
How to use this table
Find the row closest to your equal side length and read across to the perimeter. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Isosceles Triangle Perimeter Calculator for a precise answer.
Need a value that is not in the table? — the Isosceles Triangle Perimeter Calculator does it instantly, for free, with the formula and a worked example built in.
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