Question

can someone teach me how to draw a circle in Mathematica Wolfram. I have the the center and the radius.

Answer 1

Mathematica or wolfram alpha?

Answer 2

The normal one. I have it installed at home

Answer 3

is not the same btw?

Answer 4

Nah, wolfram alpha is the website. Mathematica is the code based program.

Answer 5

What is the circle?

Answer 6

Wolfram 8 installed at home

Answer 7

center (-4,-2)
f=sqrt(5)

Answer 8

Is f the focal or do you mean radius?

Answer 9

sorry i meant to write r=sqrt(5)

Answer 10

Okay, just making sure. What I would do is do this:
\[(x+4)^2+(y+2)^2=5\]

Answer 11

\[(y+2)^2=5-(x+4)^2\]
\[y+2=\pm \sqrt{5-(x+4)^2}\]
\[y=\sqrt{5-(x+4)^2}-2\]
\[y=-\sqrt{5-(x+4)^2}-2\]
Plot the last two. One is the top half the other is the bottom

Answer 12

I did it with the following syntax:
Graphics[Circle[{-4, -2}, Sqrt[5]]]
However I can only see the circle with not axis. Can someone help me with this?

Answer 13

Oh, mine is a little far fetched then haha.

Answer 14

;)

Answer 15

Already fixed that

Answer 16

A sample plot procedure written in Mathematica 8 Home Edition is attached.
There is a misspelling in the comments here and there.

Answer 17

thanks

Answer 18

Glad that someone besides myself is using Mathematica on this site.

Answer 19

Attached is a screen capture of my 8Gb IMac setup that I use for solving openstudy.com math problems.