Geometry
Perimeter of a parallelogram
Uses the slanted side, unlike the area formula. Two of each side, added and doubled.
The Formula
P = 2 x (base + side)
Uses the slanted side, unlike the area formula. Two of each side, added and doubled.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| P | Perimeter | metres | Distance around the shape. |
| b | Base | metres | Length of a parallel side. |
| s | Side | metres | Length of a slanted side. |
What Each Symbol Means
Pmetres
Perimeter
Distance around the shape.
bmetres
Base
Length of a parallel side.
smetres
Side
Length of a slanted side.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to calculate the area of a parallelogram page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Calculate The Area Of A Parallelogram, filed under Math. Every number the guide produces comes from substituting into this one line.