# What is the radius of a circle if the area is 16pi?

## What is the radius of a circle if the area is 16pi?

4
Explanation: The area of a circle is πr2 where r is the radius. Dividing both sides by π we find r2=16=42 and hence r=4 .

## What is the diameter of a circle with a circumference of 16pi?

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 . We now know that the diameter of the circle is 16 .

What is the diameter of 16pi?

We see that our radius is √16 , or 4 . Recall that the diameter is twice the length of the radius, so we can multiply this by 2 to get a diameter of 8 .

What is the radius of a circle with a circumference of 34 pi?

Given that the circumference = 34pi. We will divide by 2*pi. Then the radius of the circle = 17 unit.

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

Therefore, the radius of the circle when its circumference is 16 feet is r ≈ 2.54648 ft.

### How to calculate the radius of a circle?

This tool will calculate the radius of a circle from the circumference, and will convert different measurement units for circumference and radius. 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

How to calculate the radius of a sphere?

Sphere surface area to radius calculator. User Guide. This tool will calculate the radius of a circle from the circumference, and will convert different measurement units for circumference and radius. Formula. The formula used to calculate the circle radius is: r = C / (2 · π) Symbols. r = Circle radius. C = Circle circumference.

What is the circumference of a circle equal to?

Explanation: 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.