This trapezoid perimeter reference table shows the perimeter for a range of side a values, assuming a side b of 6, a side c of 5 and a side d of 5. Every figure is computed with the same engine that powers our Trapezoid Perimeter Calculator, so the numbers are exact.
| Side a | Perimeter |
|---|---|
| 2.5 | 18.5000 |
| 5 | 21.0000 |
| 7.5 | 23.5000 |
| 10 | 26.0000 |
| 15 | 31.0000 |
| 20 | 36.0000 |
| 30 | 46.0000 |
| 50 | 66.0000 |
| 70 | 86.0000 |
| 100 | 116.0000 |
How to use this table
Find the row closest to your side a 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 Trapezoid Perimeter Calculator for a precise answer.
Need a value that is not in the table? — the Trapezoid Perimeter Calculator does it instantly, for free, with the formula and a worked example built in.
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