# How do you write an equation for a circle with endpoints of a diameter at the points (7,4) and (-9,6)?

##### 1 Answer

Oct 25, 2016

#### Explanation:

The standard equation of a circle is:

where

Endpoints of diameter

The centre is the **MID-POINT** of a diameter

giving

To find the radius use Pythagoras on one end point of diameter and the centre.

so circle equation is;