Question

can someone help me out with the circle formula?

Answer 1

I dont understand

Answer 2

Circle formula for what? Circumference?

Answer 3

(x-g)+(y-h)

Answer 4

the one to find the radius

Answer 5

Well wait, is this circumference or not? Because I know other formulas and I don't want to give you the wrong one, you know?

Answer 6

(x-g)^2+(y-h)^2=R^2

Answer 7

i dont know what its called

Answer 8

The formula need some modifications: (x-h)² + (y-k)² = r²

Note that each term on the left is squared and the term on the right is squared.
If your equation fits this format (where h, k, and r are constants. then you have a circle
whose center is (h, k) and whose radius is r.

The radius is the R to the second power of. Either i'm confused on what you're asking, or i dont know dude.

Answer 9

I dont know how to apply it to circles. Like have a circle and its asking me to use the formula

Answer 10

OH umm

Answer 11

Here. circles (h,k) is the center of the circle and r is the radius of the circle.

just apply the values in the formula u can find the radius square and find the root value you will get the radius.

Answer 12

then what are the x and y for?

Answer 13

http://www.mathwarehouse.com/geometry/circle/images/equation-of-circle/general-formula-equation-of-circle.png

Answer 14

I honestly am not good at this, but I THINK you just put the other numbers into X & Y, You can try asking someone else in the side chat or something. Dude sorry, but I hope I helped you. Good luck! If you need any more help, i'll be here!! You can try looking this up on google, or go on yahoo answers.

Answer 15

what if the the center of my circle is the origin?

Answer 16

\(\bf (x-5)^2+(y-7)^2 = 16 \implies (x-\color{red}{5})^2+(y-\color{red}{7})^2 = 4^2\\
(\color{red}{5}, \color{red}{7}) \Leftarrow center, radius \implies 4\\
\textit{if the center of the circle is the origin (0,0}\\
(x-0)^2+(y-0)^2 = r^2 \implies x^2+y^2 = r^2\)

Answer 17

alright thank you soo much! :D

Answer 18

yw