Circles+-+Second+Hour

~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 -Katie 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

An Example of a circle in nature is the Bohr Model of the Hydrogen atom. In theory the orbit of the electron should be a circliar shape around the nucluas of the atom.

media type="custom" key="328293" 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] ||