Area measurement can be used to determine the amount of carpet used in your bedroom. It is often measured in m2.
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The perimeter of the park is 3 kilometers and the area is .5 km2
In a rectangle, the area is calculated by multiplying length x width. If (for example) both length and width are in centimeters, the area will be in square centimeters.
If the arrow is in a square you can work out the area of everything else. Then subtract that from the total area of the square leaving you with the area of the arrowhead. An example is linked below in related links tab.
Area is expressed in units of area - for example in square inches, but not in inches.
The area would become four times larger. The area increase is always the perimeter increase, squared. For example. If the sides of a square were quadrupled, the area would become sixteen times larger.