How do you get the area of a circle with the circumference?

How do you get the area of a circle with the circumference?

How to find the area of a circle from the circumference?

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 find the area with the radius?

The area of a circle is pi times the radius squared (A = π r²).

Can the circumference and area of a circle be the same?

Hence, only when radius is 2 then circumference and area of the circle can be same. Numerically they will be the same when the radius is 2 units. Both circumference and the area will be 4 times pi. the equation: 3.14 * (r^2) = 2 * 3.14 * r (where r = radius of the circle), gives the value of r as 2.

How do you find the area of part of a circle?

The formula for sector area is simple – multiply the central angle by the radius squared, and divide by 2: Sector Area = r² * α / 2.

What is pi r2?

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 circumference of circle is 2pir?

Hint: It is a well-known fact that the ratio of the circumference of a circle to its diameter is fixed and its value is 3.14159… which is symbolically represented as π. Therefore, circumference = π × diameter = 2π × radius.

How do you find the shaded area of a circle?

Answer: The area of the shaded sector of the circle is A = (θ / 2) × r2 where θ is in radians or (θ / 360) × πr2 where θ is in degrees. Let’s see how we will use the concept of the sector of the triangle to find the area of the shaded sector of the circle.

How do you find the shaded region of a circle?

To get the area of the shaded region, subtract the area of the smaller circle from the area of the larger circle.

How do you find the area of a shaded region of a circle?

Why is the area of a circle πr2?

We can clearly see that one of the sides of the rectangle will be the radius and the other will be half the length of the circumference, i.e, π. As we know that the area of a rectangle is its length multiplied by the breadth which is π multiplied to ‘r’. Therefore, the area of the circle is πr2.

How to find the area of a circle from the circumference?

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 find the area if you don’t know the radius?

If you don’t know the radius, however, you can still calculate the area if you are given the length of the circle’s circumference, or perimeter. You can use a two-step process, solving first for the radius using the formula for the circumference: . Then you can use the formula to find the area. You can also use the formula

What is the circumference of a circle with a radius of 1m?

To calculate the circumference of a circle with a radius of 1 meter, simply follow those steps: 1 Multiply the radius by 2 to get the diameter of 2 meters. 2 Multiply the result by π, or 3.14 for an estimation. 3 And there you go; the circumference of a circle with a radius of 1 meter is 6.28 meters.

How to find the radius of a circle by dividing it?

By dividing a circle into equal parts as shown in the picture below, we can rearrange the parts into an approximate rectangle. The length of this approximate rectangle equals the half of the circumference of the circle, r × π r × π. The width of this approximate rectangle is the radius r r of the circle.