# What is the standard form of the equation of a circle with center of a circle is at (-15,32) and passes through the point (-18,21)?

##### 1 Answer

Nov 14, 2015

#### Explanation:

The standard form of a circle centred at (a,b) and having radius r is

So in this case we have the centre, but we need to find the radius and can do so by finding the distance from the centre to the point given :

Therefore the equation of the circle is