This heron's formula reference table shows the triangle area for a range of side a values, assuming a side b of 4 and a side c of 5. Every figure is computed with the same engine that powers our Heron's Formula Calculator, so the numbers are exact.
| Side a | Triangle area | Perimeter |
|---|---|---|
| 1.5 | 2.4804 | 10.50 |
| 2.3 | 4.5055 | 11.30 |
| 3 | 6.0000 | 12.00 |
| 4.5 | 8.5493 | 13.50 |
| 6 | 9.9216 | 15.00 |
| 9 | 0.0000 | 18.00 |
How to use this table
Find the row closest to your side a and read across to the triangle area. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Heron's Formula Calculator for a precise answer.
Need a value that is not in the table? — the Heron's Formula Calculator does it instantly, for free, with the formula and a worked example built in.
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