This trapezoid area reference table shows the area for a range of parallel side a values, assuming a parallel side b of 4 units and a height (perpendicular) of 5 units. Every figure is computed with the same engine that powers our Trapezoid Area Calculator, so the numbers are exact.
| Parallel side a | Area | Median (mid-segment) |
|---|---|---|
| 2 units | 15.0000 | 3.0000 |
| 4 units | 20.0000 | 4.0000 |
| 6 units | 25.0000 | 5.0000 |
| 8 units | 30.0000 | 6.0000 |
| 12 units | 40.0000 | 8.0000 |
| 16 units | 50.0000 | 10.0000 |
| 24 units | 70.0000 | 14.0000 |
| 40 units | 110.0000 | 22.0000 |
| 56 units | 150.0000 | 30.0000 |
| 80 units | 210.0000 | 42.0000 |
How to use this table
Find the row closest to your parallel side a 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 Trapezoid Area Calculator for a precise answer.
Need a value that is not in the table? — the Trapezoid Area Calculator does it instantly, for free, with the formula and a worked example built in.
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