# How do you find the perimeter or circumference, and the area of a circle with radius 4.2 in?

##### 1 Answer

Jun 13, 2018

See a solution process below:

#### Explanation:

The formula for the perimeter or circumference of a circle is:

The formula for the area of a circle is:

In both formulas

Substituting

**Circumference:**

If you need a number we can substitute

**Area:**

Again, if you need a number we can substitute