Quick Homework Help

# The points(-2,0) and (2,0) are endpoints of the diameter of a circle.find it's equation ⚑ Flag

by clark017 at May 19, 2010

My questions is about circles.

## Answers

you have to find the midpoint and radius of the circle to get the equation the midpoint is (0,0) the diameter is 2--2 =4 the radius is 2 the formula for the equation is (x-(x of midpoint) )^2 + (y-(y of midpoint) )^2=r^2 sub in and get x^2+y^2=4

lammy. May 20, 2010

the center is (0,0) because that is the mid point and the radius is 2 because that is the distance between the center and the point on the circle.  The equation is (x-0)^2 + (y-0)^2 = 4

Jeremy.holder May 20, 2010

x^2+y^2=4

gibby. May 20, 2010

The answer is pretty simple. All you have to do is see that the center of the circle is at 0, and that the radius is 2 considering you have to go up or down 2 to get the points. Therefore the equation of the circle is x^2 + y^2 = 4

Sadie May 20, 2010

i believe it is this also x^2+y^2=4

COWGIRL May 20, 2010

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