Homework Help: math

Posted by Garrick on Thursday, October 9, 2008 at 9:52pm.

-a circle with center at the point O(0,0) also has the point P(-2,3) on it. The equation of this circle is?

and a second question:
-A circle has a center of square root 5. The equation of this circle is?

Please help me.

math - Reiny, Thursday, October 9, 2008 at 10:47pm
the general equation of a circle with centre at (0,0) is
x^2 + y^2 = r^2

sub in your given point to find r^2 and you are done.

your second question makes no sense
the centre of a circle is a position, not a value.

Answer this Question

Related Questions

physics - An object, after being released from its circular path, travels the ...
NEED MAJOR HELP! *QUADRATIC EQUATIONS* - Write the equation for the circle with ...
mathematics - The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2....
mathematics - The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2....
mathematics - The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2....
Trigonometry - 1) Find the coordinates of the point (-1,3) after the ...
mathematics - The circle x2-2x+y2-4y-4=0 lies on the cartesian plane,question 2....
math - From an exteror point P that is h units form a circle of radius r, a ...
Math - Circle C has radius 4 inches. Circle D had radius 9 inches. These two ...
physics - A block of mass m = 4.30 kg is released from rest from point circle a ...

For Further Reading

First Name:
School Subject:
Answer: