# What is the circumference with the radius of 4 ft?

## What is the circumference with the radius of 4 ft?

8 π
Answer: The circumference of a circle with a radius of 4 is 8 π.

## What is the radius of a 4 ft circle?

4ft * 12 in / ft = 48 in. 2r = 48 in. r = 24 in.

What is the diameter of a circle with a 4 radius?

If you know the radius of the circle, double it to get the diameter. The radius is the distance from the center of the circle to its edge. If the radius of the circle is 4 cm, then the diameter of the circle is 4 cm x 2, or 8 cm.

### What is the circumference when the radius is 4cm?

The circumference is 8πcm or 25.12cm .

### What is the perimeter of a 4 circle?

To find the perimeter of the quarter circle, find the circumference of the whole circle, divide by 4, and then add the radius twice. To find the radius when you are given the area of the quarter circle, multiply the given area by 4, then plug this number in for A into the formula A = pi * r^2 and then solve for r.

What is the area of radius 4?

16π sq. units
Answer: The area of the circle with a radius of 4 units is 16π sq. units.

## What is the area of a 4 diameter circle?

Circumferences and areas of circles with diameters in inches.

Diameter (in) Circumference (in) Area (in2)
4 1/8 12.96 13.36
4 3/16 13.16 13.77
4 1/4 13.35 14.19
4 5/16 13.55 14.61

## How do you find a circumference?

To find the circumference of a circle, multiply the circle’s diameter by pi (3.14).

How do you find the circumference of a circle with the diameter?

Circle/Diameter

### What is the diameter of 4 circumference?

Circumference & Areas

Size in Inches Circumference Inches Area in Square Inches
3 3/4 11.780 14.060
4 12.570 16.000
4 1/4 13.350 18.060
4 1/2 14.140 20.250

### What is the diameter of radius 4cm?

The diameter will be of length 8 cm.

What is the circumference of a circle with a diameter of 4?

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. Moreover, what is the circumference of a 4 ft diameter? 3.14 x 4 = 12.56 ft.

## What is the scale factor of a circle of 4 feet radius?

First circle of 4 feet radius has circumference.. (C1) i.e 2πr and replacing the value of r as 4 ft.. 8π … (1). Next the Second Circle of 9 ft the circumference (C2) i.e 2πr and by the value of r as 9 ft we get… 18π … (2). Therefore the scale factor of the smaller one to the bigger one will be in the following ratio… 100 : 225 is the answer.

## What is the formula to find the radius of a circle?

Formula. The formula used to calculate the circle radius is: r = C / (2 · π) Symbols. r = Circle radius. C = Circle circumference. π = Pi = 3.14159…. Circumference of Circle. Enter the circumference which is the total length of the edge around the circle, if it was straightened out.

How do you find the circumference of a 5 foot circle?

Assuming the circle diameter is equal to 5 ft, then the circle circumference is equal to pi×diameter or 3.14159×5 ft = 15.70795 ft or approximately 15.7 ft. Beside above, what is the circumference of 4? The circumference of a circle can be found by multiplying pi (π = 3.14) by the diameter of the circle.