# What is the circumference of a circle with a radius = 4.25 in? What is the circumference of a circle with a diameter = 27.8 m?

##### 1 Answer

The first circumference is 26.69 and the second is 87.292

#### Explanation:

The formula for finding the circumference of a circle is

Think about it this way: Multiply 2

The first question tells you the radius, so we already know that

There's your first answer!

The second one is a little more complicated, but still fairly straightforward. The radius of a circle is always half of the diameter , so divide

There's your second answer!