Trapezoid Area Calculator
Calculate trapezoid area from two parallel sides and perpendicular height.
How to use
- Enter parallel sides a and b.
- Enter perpendicular height h and calculate.
Capabilities and scope
The runner also reports the midline, the average length of the parallel sides.
How it works
It uses A=(a+b)h/2 and midline=(a+b)/2.
Example
Parallel sides 8 and 5 with height 4 give area 26.
Useful for
- Find area of a trapezoidal plot or section
- Check area through average parallel width
Before you use it
- Height must be perpendicular; parallel sides are non-negative with at least one positive.
Frequently asked questions
Can one parallel side be zero?
Yes. With the other side and height positive, the runner accepts the triangular limiting case.