MihsabaHow to use
Area depends only on the two parallel bases and perpendicular height. The inverse modes solve a missing height or base. Perimeter cannot be inferred from bases and height alone, so it is only shown when both legs are supplied and pass a basic geometric validity check.
- Choose direct calculation or an inverse height/base mode.
- Enter known values in one consistent unit.
- In direct mode, optionally add both legs for perimeter.
- Calculate and review area, midsegment and solved measurements.
How it is calculated
Example
Bases 8 and 12 with height 5 give area 50 and midsegment 10. If area 50 and those same bases are entered in inverse mode, height 5 is recovered.
Important notes
Height is the perpendicular distance between the bases, not a slanted leg. Perimeter requires the actual leg lengths; the tool never silently assumes an isosceles trapezoid.
Frequently asked questions
Are bases and height enough for perimeter?
No. They determine area, not the two leg lengths.
What is the midsegment?
It is the average of the two bases: (a+b)/2.
Can a base be solved from area?
Yes, when area, height and the other base are known.
Is this calculator free?
Yes. It is free to use and requires no account.