Trapezoid Area
Calculator
Results
- Area
- 26
- Midsegment
- 6.5
Results
| Area | 26 |
| Midsegment | 6.5 |
formula-map diagram
- Area
- 26
- Midsegment
- 6.5
Formula map
Formula
A = ((a + b) ÷ 2) × h= 26
Note
Simplified model: these are exact results of the stated idealised formulas, assuming perfect shapes and exact inputs. Real measurements carry error, and the ellipse perimeter is a Ramanujan approximation. Verify independently before relying on these figures.
More in Mathematics
See all →Frequently asked questions
What inputs does the trapezoid area calculator use?+
The lengths of the two parallel sides (often called bases, a and b) and the perpendicular height between them.
What is the formula?+
Area equals the average of the two parallel sides times the height: A = ((a+b)/2) × h. It works because a trapezoid can be thought of as a rectangle with the average base width.
Is the height the same as the slanted side length?+
No, height is the perpendicular distance between the two parallel sides, not the length of the slanted (non-parallel) sides. Using a slanted side as the height will give an incorrect area.
What happens if the two parallel sides are equal?+
If a and b are equal, the shape is actually a rectangle or parallelogram, and the formula still works correctly, simplifying to base times height.
Can this handle a right trapezoid?+
Yes, the same formula applies regardless of whether the trapezoid has right angles on one side or is symmetric — only the base lengths and height matter for area.