a (-1,-7) and b(-10,-8) are the endpoints of a diameter of a circle. find the radius of the circle. (step by step response please) :)

Question

mertsj · Answer

Use the distance formula to find the length of the diameter and divide it by 2.  That will be the radius.

anonymous · Answer

how do you find the numbers to put in the distance formula?

mertsj · Answer

They are given in the problem.  x1=-1, y1=-7, x2=-10, y2=-8

anonymous · Answer

im sorry, im still confused ....

mertsj · Answer

Do you know the distance formula?

anonymous · Answer

yes

mertsj · Answer

What is it?

anonymous · Answer

-b$$\sqrt{b^2-4AC}/2A$$

anonymous · Answer

-b +/_

anonymous · Answer

well, you got the quadratic formula!

mertsj · Answer

$$d=\sqrt{(x _{2}-x _{1})^{2}+(y _{2}-y _{1})^2}$$

mertsj · Answer

Plug the numbers into that.  Simplify and divide by 2.  That will be the radius.

anonymous · Answer

ha whoops .... my bad i prob shouldn't watch the super bowl while attempting math... thank you!

mertsj · Answer

Sounds like a plan.  Who are you rooting for?

anonymous · Answer

the browns! haha

mertsj · Answer

Go Browns

anonymous · Answer

here we go brownies here we go!!

anonymous · Answer

wait the answer comes out negative...

anonymous · Answer

The browns arent playing silly. It's the giants and patriots

anonymous · Answer

i know lol

anonymous · Answer

okay good