Perimeter: add all sides
area: multiply length times width for rectangles
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To calculate the area you multiply the width times lenghth.the numbers that are on the side of the shape multiply them and you'll get the area. Now to get the perimeter you add the numbers on the sides together. Add lenght times width.that's how you get your perimter and area.
Perimeter and area are not sufficient to determine the shape of a figure.
To calculate the perimeter of an area, you first need to determine the shape of the area. Since acres are a unit of area, not perimeter, we need more information to calculate the perimeter in meters. If we assume the shape is a square, we can find the side length by taking the square root of the area in acres (239.272 acres) and then convert that length to meters. Once we have the side length, we can multiply it by 4 to find the perimeter in meters.
Area is the amount of square units in a 2-D shape, and perimeter is the distance around a shape
You have to add all the sides of the shape .