# A circle has center (1,3) and passes through (4,-1) How do you use the distance formula to find the length of the radius of the circle?

##### 1 Answer

Apr 5, 2016

#### Answer:

By definition the **radius** of a circle is the distance between the center and any point on the circumference of the circle.

#### Explanation:

If a circle has

and

The radius of the circle is