# How do you find the area when given the circumference?

## How do you find the area when given the circumference?

The area of a circle is given by the formula A = π r2, where A is the area and r is the radius. The circumference of a circle is C = 2 π r. If we “solve for r” in the second equation, we have r = C / (2 π ). Now we use this to replace r in the first equation: A = π [ C / (2 π ) ]2.

### How do you find area with circumference and radius?

To find the area of a circle from the circumference, follow these steps:

1. Divide the circumference by π.
2. Divide the result by 2 to get the circle’s radius.
3. Multiply the radius by itself to get its square.
4. Multiply the square by π, or 3.14 for an estimation.
5. You found the circle’s area from the circumference.

How do you do area of a circle?

The area of a circle is pi times the radius squared (A = π r²). Learn how to use this formula to find the area of a circle when given the diameter.

How do you find the area of a circular ring?

Area of a Circular Ring

1. = πR2 – πr2.
2. = π(R2 – r2)
3. The outer diameter and the inner diameter of a circular path are 728 m and 700 m respectively.
4. The outer radius of a circular path R = 728m2 = 364 m.
5. The inner radius of a circular path r = 700m2 = 350 m.
6. The inner radius of a circular path r = 630m2 = 315 m.

## How do you find the area of a circle when you have the circumference?

If you know the circumference, radius, or diameter of a circle, you can also find its area. Area represents the space enclosed within a circle. It’s given in units of distance squared, such as cm 2 or m 2. The area of a circle is given by the formulas: A = πr 2 (Area equals pi times the radius squared.)

### What is the formula for finding the circumference of a circle?

To calculate the circumference of a circle, use the formula C = πd, where “C” is the circumference, “d” is the diameter, and π is 3.14. If you have the radius instead of the diameter, multiply it by 2 to get the diameter.

What is the formula for finding area of a circle?

Think of the area of the circle as if you draw the circumference and fill in the area within the circle with paint or crayons. The formulas for the area of a circle are: A = π * r^2. In this formula, “A” stands for the area, “r” represents the radius, π is pi, or 3.14.

How do I find diameter of circle if I have circumfrence?

How to find the circumference of a circle: The circumference of a circle can be found by multiplying pi ( π = 3.14 ) by the diameter of the circle. If a circle has a diameter of 4, its circumference is 3.14*4=12.56. If you know the radius, the diameter is twice as large.