plug in 2 centimeters for r in the formula. So we have (2)(π)(2 cm) which is equal to 4π cm.

Also, What is the circumference if the radius is 4?

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

Hereof, How do you find circumference with area?

The formula C = 2√πA is designed to find a circle’s circumference using the area (A). Alternatively, you can solve the equation A = πR2 in reverse to find R, then plug R into the circumference equation.

Also to know What is the radius of a circle with 16 units? So the right answer is 804.

What estimate is closest to the circumference of a circle with a radius of 10 cm?

2π10=20π cm or about 62.8 cm.

## What estimate is closest to the area of a circle with a radius of 4 cm?

What is the area of a circle with radius 4 cm?

Result: The area of a circle with radius 4 is 50.27
Formulae:
r = 4 d = 8 C = 25.1 A = πr

2

= π(d2)

2

A

= C

2

4π π = 3.1415 A = area C = circumference or perimeter r = radius, d = diameter

## What is the circumference with a radius of 6?

If r = 6 cm, the the circumference is c = 2π(6) = 12π cm, if writing in terms of π. If you prefer a numerical value, the answer rounded to the nearest tenth is 37.7 cm. Suppose you only know the diameter?

## What estimate is closest to the circumference of a circle with a radius of 4 cm?

The circumference is 8πcm or 25.12cm .

## How do you find the radius of 16?

The circumference of a circle is equal to π , which is a number ≈3.14 , multiplied by the diameter of the circle. Therefore, C=πd . We can divide both sides by π to see that 16=d .

## What is the radius of a circle is 3 units?

if the radius is 3, just think of the radius as the half of the diameter, so your answer would be the diameter is 6.

## What is the diameter of the radius is 16?

162=8 centimeters.

## What is the radius of a circumference of 10?

Divide the circumference by π, or 3.14 for an estimation. The result is the circle’s diameter, 3.18 centimeters. Divide the diameter by 2. And there you go, the radius of a circle with a circumference of 10 centimeters is 1.59 centimeters.

## Would a circle with a radius of 10 cm have the same circumference as a circle with a diameter of 20 cm?

Radius is half a diameter. Therefore, a 10 cm radius will have a 20 cm diameter so it will have the same circumference.

## Which is the area of a circle with a radius of 6 cm?

What is the area of a circle with radius 6 centimeters?

Result: The area of a circle with radius 6 is 113.1
Formulae:
r = 6 d = 12 C = 37.7 A = πr

2

= π(d2)

2

A

= C

2

4π π = 3.1415 A = area C = circumference or perimeter r = radius, d = diameter

## What is the area of a radius of 4 cm?

The solution to the formula for a 4cm radius is 50.24 cm^2.

## What is the area if the radius is 6 cm?

What is the area of a circle with radius 6 centimeters?

Result: The area of a circle with radius 6 is 113.1
Formulae:
r = 6 d = 12 C = 37.7 A =

πr

2

= π(d2)

2

A = C

2

4π π = 3.1415 A = area C = circumference or perimeter r = radius, d = diameter

## What is the area of 6 radius?

113.1 square inches (in²)

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

The length of a diameter is 2r which is why C= πd. Using this formula, we know that r= 4cm. Thus, C= 2(4)π = 8π ≈ 25.13 centimeters.

## What is the area of a 6 cm circle?

The area of a circle is equal to Pi π times the radius r squared. Substitute in the value of the radius r=6 into the formula for the area of a circle. Pi π is approximately equal to 3.14 . Raise 6 to the power of 2 .

## What is the radius of 18?

What is the radius of a 18 inch circle? To find the radius, then, we insert 18 in for the circumference. So 18=2∏r. Solving for r gives 9/∏, or approximately 2.86 inches.

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

Use the diameter to find the radius by dividing the diameter by 2. For example, if the diameter is 4, the radius would be 2.

## What is the diameter of the radius is 12?

First you need to find the radius, the key term to find the radius is diameter=2⋅radius ; therefore the radius r is 122=6 inches.