The measurement of a two-dimensional region enclosed by a polygonal chain.
Formulas
The following formulas can be used to find the area A of some common polygons:
| Area of a square
|
A = s\(^2\) | s: length of one side |
| Area of a rhombus
|
A = \(\frac {d\space ×\space D}{2}\) | d: length of the shorter diagonal D: length of the longer diagonal |
| Area of a parallelogram
|
A = b × h | b: base h: height |
| Area of rectangle
|
A = b × h | b: base h: height |
| Area of a triangle
|
A = \(\frac{b\space ×\space{h}}{2}\) | b: base h: height |
| Area of a trapezoid
|
A = \(\frac{(b\space+\space{B})\space×\space{h}}{2}\) | b: shorter base B: longer base h: height |
| Area of a regular convex polygon
|
A = \(\frac{a\space×\space{P}}{2}\) | s: length of a side a: slant height n: number of sides P: perimeter (P = ns) |
