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Mathematics 20 Online
OpenStudy (anonymous):

Graph the circle (x – 4)2 + (y – 2)2 = 25. Label the center and at least four points on the circle.

Directrix (directrix):

The center is at (4, 2) and the radius is 5. See attachment for how to get that.

Directrix (directrix):

You don't have the graph yet.

OpenStudy (anonymous):

Since the radius is 5, I can find my four points by moving 5 points in any direction?

Directrix (directrix):

Yes, I would move horizontal 5 units left and right from the center to get two points and then up and down 5 units from the center. What points did you get? @dopegyal_

OpenStudy (anonymous):

(9,2) , (4,7) , (-1,2) , (4,3)

OpenStudy (anonymous):

Can I use those?

Directrix (directrix):

Check this one: (4,3)

OpenStudy (anonymous):

4,2

OpenStudy (anonymous):

?

Directrix (directrix):

(4,2) is the center. So, move 5 units down (vertically) from the 2. Where do you land when you do this?

OpenStudy (anonymous):

-3

Directrix (directrix):

|dw:1381884375573:dw|

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