Circumference & Areas
Size in InchesCircumference InchesArea in Square Inches
6 1/419.64030.680
6 1/220.42033.180
6 3/421.21035.780
721.99038.480

In this regard, what is the radius of a 7 inch circle?

The radius of this circle is 7 inches, so the diameter is 2(7) = 14 inches.

Subsequently, question is, what is the circumference of a 7.5 inch circle? You should be familiar with the formula: circumference = 2 * pi * r. So: 7.5 = 2 * pi * r => r = 7.5 / (2*pi).

Also to know, what is the diameter of a circle calculator?

You can also use it to find the area of a circle: A = π * R² = π * 14² = 615.752 cm² . Finally, you can find the diameter – it is simply double the radius: D = 2 * R = 2 * 14 = 28 cm . Use our circumference calculator to find the radius when you only have the circumference or area of a circle.

What is the diameter of a 30 inch circle?

94.24 inches

## What is a radius of a circle?

The radius of a circle is the distance from the center of the circle to any point on its circumference.  The easiest way to find the radius is by dividing the diameter in half.

## What is the circumference of a 12 inch circle?

To find the circumference of a circle, you will use the formula C=2⋅π⋅r ; therefore the circumference C is 2⋅π⋅6≈38 inches.

## How do you find a diameter?

To calculate the diameter of a circle, multiply the radius by 2. If you don't have the radius, divide the circumference of the circle by π to get the diameter. If you don't have the radius or the circumference, divide the area of the circle by π and then find that number's square root to get the radius.

## What is the area of a 14 inch circle?

Area of a 14 Inch Circle
615.75square inches
4.2761square feet
0.39726square meters
3,972.6square centimeters

## How do you measure a circle?

The formula is: circumference = pi times the diameter. For most projects, 3.14 can be used as the value for pi. Rewriting the equation, the circumference = 3.14 X diameter. For example, a circle with a diameter of 6 inches has an approximate circumference of 18.84 inches.

## How do I calculate circumference?

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. You can also use the formula for circumference of a circle using radius, which is C = 2πr.

## What is half the circumference of a circle called?

Calculating the circumference of a circle. The distance around a rectangle or a square is as you might remember called the perimeter. Half of the diameter, or the distance from the midpoint to the circle border, is called the radius of the circle (r).

## How many square inches is an 8 inch circle?

Area of a 8 Inch Circle
201.06square inches
1.3963square feet
0.12972square meters
1,297.2square centimeters

## What is the length of a diameter?

The diameter of a circle is the length of the line through the center and touching two points on its edge.

## What is the circumference of a 10 foot diameter circle?

Calculating Circumference From Diameter

So if the diameter of your circle is 10 feet, you'd calculate 10 × 3.14 = 31.4 feet as the circumference, or 10 × 3.1415 = 31.415 feet if you're asked for a more exact answer.

## Is diameter a chord?

A chord of a circle is a straight line segment whose endpoints both lie on the circle. A chord that passes through a circle's center point is the circle's diameter. Every diameter is a chord, but not every chord is a diameter. The word chord is from the Latin chorda meaning bowstring.

## What is the circumference of an 8 foot circle?

We can see that the diameter of the circle is 8 inches. Let's put this number into the formula. The circumference of a circle that has a diameter of 8 inches is 25.12 inches.

## What is the circumference of a 16 foot circle?

r = 8/π (ft.) Therefore, the radius of the circle when its circumference is 16 feet is r ≈ 2.54648 ft. C = 2 (3.14159) (2.54648) ft.

## How do you find area?

To find the area of a rectangle multiply its height by its width. For a square you only need to find the length of one of the sides (as each side is the same length) and then multiply this by itself to find the area.

## How do I work out the area of a semicircle?

In the case of a circle, the formula for area, A, is A = pi * r^2, where r is the circle's radius. Since we know that a semicircle is half of a circle, we can simply divide that equation by two to calculate the area of a semicircle. So, the formula for the area of a semicircle is A = pi * r^2/2.

## What is the radius of a circle calculator?

Substitute this value to the formula for circumference: C = 2 * π * R = 2 * π * 14 = 87.9646 cm . You can also use it to find the area of a circle: A = π * R² = π * 14² = 615.752 cm² . Finally, you can find the diameter – it is simply double the radius: D = 2 * R = 2 * 14 = 28 cm .

## What is the radius of 30?

The reason being is that radii ( 2⋅radius ) are equal to the diameter of a circle. Therefore, if the diameter is equal to 30m, then the two radii equals 30m. However, you want the radius, so half of 30m ( 302 ) is 15m.