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Area of a Circle:

pi X r2

Where "r" is the radius.

Perimeter of a Circle:

2 X pi X r

OR

pi X d

Where "r" is the radius and "d" is the diameter.

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Q: Formula for finding the area and perimeter of acircle?
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Rules of parameterarea in math for 7th class?

Do you mean "perimeter" and "Area"? If so, if you are finding the perimeter of a figure, you take the lengths of all of the sides and add them up. If you are finding area, the method of which you find the area of the figure depends on what the figure is. For quadrilaterals, the formula is: A=lw.(Area=length times width) For triangles, the formula is: A=1/2lw. (Area=One half length times width)


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Is the formula for finding the area of an oval the same as the formula for finding the area of a circle?

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What is the formula for finding the perimeter of a square that has an area of 144 square inches?

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