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2,,r or ,,d

2x pi x radius or Pi x Diameter

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Q: What is the formula for calculating a circles perimeter?
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Related questions

What is the formula for calculating perimeter of dodecagon?

Assuming the shape is a regular dodecagon, the formula for calculating the perimeter for a dodecagon of side length n is equal to 12n.


What is the formula for calculating the area of a regular pentagon?

The formula is 1/2 (apothem) (perimeter)


What is the formula for calculating the perimeter of a regular polygon?

L2 + H2 = P


Formula of a rectangle?

There is no formula for a rectangle. There are formula for calculating its area, perimeter or length of diagonals from its sides, or it is possible to calculate the length of one pair of sides given the other sides and the area or perimeter, or the two lots of sides given area and perimeter and so on.


What is the boundary of a circle?

The boundary or perimeter of a circle is called the circumference. The formula for calculating the length of the circumference is C = 2πr.


What is the perimeter formula?

The question is very vague so there are many possible answers. In its simplest sense, perimeter is equal to all the sides of a shape added together. For circles it is 2*pi*radius.


What is the perimeter of a circle with a diameter of 8 inches?

The perimeter of a circle is called its circumference. The formula for calculating the circumference is: C = πd (pi x diameter).In this case, this would be 8 in. x 3.14... or about 25.13 inches.


What is formula for calculating the perimeter of a square?

Just like any other rectangle, you can usePerimeter = 2 x (length + width)Or, since length and width are the same for a square, Perimeter = 4 x (length of one side).


Why circles are important?

Well, in math you solve the perimeter of circles and such, and learn understanding of them to help you with circles in real life.


What is the formula for a triangle in math?

There are different formulae for calculating the lengths of the sides or altitudes, medians, etc; the measure of angles, the perimeter and area. Furthermore, these depend on the information available.There are different formulae for calculating the lengths of the sides or altitudes, medians, etc; the measure of angles, the perimeter and area. Furthermore, these depend on the information available.There are different formulae for calculating the lengths of the sides or altitudes, medians, etc; the measure of angles, the perimeter and area. Furthermore, these depend on the information available.There are different formulae for calculating the lengths of the sides or altitudes, medians, etc; the measure of angles, the perimeter and area. Furthermore, these depend on the information available.


Formula for calculating the area of sphere?

Formula for calculating the area of sphere is : 4 * pi * r * r


How do you calculate the area and perimeter or semi circles?

Area: 1/2πr2 Perimeter: 1/2πd+d