Trapezoid Side Calculator

Your details

Choose whether to find a missing side, or compute all shape properties.
Total perimeter of the trapezoid (sum of all four sides).
The longer of the two parallel sides.
The shorter of the two parallel sides.
One of the non-parallel sides (leave blank if this is the unknown).
Leave this blank (or zero) to calculate it from the perimeter and the other three sides.
Missing side
10

The fourth side calculated from perimeter minus the other three sides.

Missing side10
Area-
Perimeter-
Median-

Missing side = 10.0000 cm

  • The missing side is 10.0000 cm, found by subtracting the other three sides from the perimeter.
  • Verification: 12.00 + 8.00 + 6.00 + 10.0000 = 36.0000 cm (should equal 36.00 cm).

Next stepSwitch to Full Shape mode to also calculate the area, height, diagonals, and angles.

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