Question

Write the equation of a circle given the center (2, 9) and raduis r = 3.

Answer 1

`(x-1)^2+(y-9)^2=3^2`

Explanation:

The standard form of the equation of a circle is:

`(x-a)^2+(y-b)^2=r^2`

Where a and b are the x and y, coordinates, and r is the radius.

So, you can just substitute the a and b values for the x and y values of the center to find the equation of the circle.