Area
The area of a plane figure, measured in square units(or units2), is the number of squares required to cover it completely.
Example:
The figure shown has an area of 9.5 square units: 8 whole squares plus 3 half-squares.
Here are some formulas for the areas of common plane figures.
Square |
|
Rectangle |
|
Triangle |
 |
Triangle |
 |
Parallelogram |
|
Trapezoid |
 |
Circle |
A = πr2 |
