# How do you write the equation of the circle with center (2,4) and containing the point (-2,1)?

##### 1 Answer

Apr 27, 2016

#### Explanation:

The equation of a circle with center

We are told that the center of this circle is

However, we don't know the radius of this circle. Luckily, we are also told that this circle contains the point

The radius of the circle is