Calculating your median (midsegment) is straightforward once you know the Trapezoid Median formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Trapezoid Median Calculator.
What is Trapezoid Median?
The Trapezoid Median calculation tells you your median (midsegment) from a few simple inputs. The figure you are solving for here is the median (midsegment).
The Trapezoid Median formula
The core formula is:
Median (midsegment) = (Parallel side a + Parallel side b) ÷ 2Here is what each input means:
- Parallel side a — a number. Example: 10.
- Parallel side b — a number. Example: 6.
How to calculate it step by step
- Write down the parallel side a (for example, 10).
- Write down the parallel side b (for example, 6).
- Apply the formula above to get your median (midsegment).
- Double-check the result with the Trapezoid Median Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Parallel side a | 10 |
| Parallel side b | 6 |
| Median (midsegment) | 8.0000 |
With parallel side a of 10 and parallel side b of 6, the median (midsegment) works out to 8.0000.
Example 2
With parallel side a of 20 and parallel side b of 6, the median (midsegment) works out to 13.0000.
| Result | Value |
|---|---|
| Median (midsegment) | 13.0000 |
Example 3
With parallel side a of 5 and parallel side b of 6, the median (midsegment) works out to 5.5000.
| Result | Value |
|---|---|
| Median (midsegment) | 5.5000 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
Prefer not to do the maths by hand? — the Trapezoid Median Calculator does it instantly, for free, with the formula and a worked example built in.
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