how do you find the radius of a circle with center at the origin and with the point (-2,5) on the circle?

Question

owlfred · Answer

Hoot! You just asked your first question! Hang tight while I find people to answer it for you. You can thank people who give you good answers by clicking the 'Good Answer' button on the right!

anonymous · Answer

You could do one of two things:  You could use the distance formula to find the radius (x1+x2/2, y1+y2/2) and square it, putting it on one side of the equal sign.  Then, you take those coordinates, and you place them in the formula for a circle ((x2-x1)^2+(y2-y1)^2=r^2).  And remember, always use the sign OPPOSITE the numbers in the coordinate pair.  That is a critical point that alotta ppl miss

toxicsugar22 · Answer

hey can u help me

anonymous · Answer

Sure, toxicsugar.  What'ya need?