~The equation of a circle follows the Pythagorean Therom applied to any point on the circle
-Equation of a circle: (x-a) ² + (y-b) ² = r²

~A circle is the set of all points in a plane at a fixed distance (the radius) from a given point (the centre)

Haiku:
I am a conic
You can find me in nature
Circle is my name
-Katiemoz-screenshot.jpg
Haiku:
I am in nature
I am a shape of a clock
I am a circle
-alex
Haiku:
Circles are so cool
They can be found everywhere
They are in nature
-alex
Haiku-
I am a gum ball
I have a diameter
Roundness is my game
-Kendra

Types of conic sections
Types of conic sections
external image magnify-clip.pngTypes of conic sections


An Example of a circle in nature is the Bohr Model of the Hydrogen atom.
emit.gif
http://pstutorialsblog.com/brushes/circles.gif
http://pstutorialsblog.com/brushes/circles.gif

In theory the orbit of the electron should be a circliar shape around the nucluas of the atom.

moz-screenshot-1.jpg
Links to other sites:

http://www.abc.net.au/science/photos/mathsinnature/photo8.htm Circles!

Contents

[hide]* 1 Types of conics 1.1 Degenerate cases 1.2 Eccentricity* 2 Cartesian coordinates* 3 Homogeneous coordinates* 4 Polar coordinates* 5 Properties* 6 Applications* 7 Dandelin spheres* 8 See also* 9 External links* 10 References