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Mathematics 9 Online
OpenStudy (anonymous):

.

OpenStudy (anonymous):

OpenStudy (anonymous):

I'm lost.

Directrix (directrix):

Plot the center and the point first on that grid.

Directrix (directrix):

The radius of the circle is the distance from the center to the given point.

OpenStudy (anonymous):

Okay(:

Directrix (directrix):

Look at this. Solve for r.

OpenStudy (anonymous):

5?

Directrix (directrix):

Correct. So we are back to doing the "usual" now.

Directrix (directrix):

This given point counts as one of the four points but I am going to do the "usual."

OpenStudy (anonymous):

Points: (3,-7) , (3,3) , (-2,-2) , (8,-2) ?

OpenStudy (anonymous):

Equation: (x-3)^2 + (y+2)^2

Directrix (directrix):

Time to compare.

Directrix (directrix):

Did we get the same results?

OpenStudy (anonymous):

Yes we did. (:

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