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Friday, December 02, 2005

My Acrostic

Circumscribed surface or space of plane curve everywhere equidistantfrom a given fixed point is a circle.
If only (part of) a circle is known, then the circle's center can be constructed as follows: take two non-parallel chords, construct perpendicular lines on their midpoints, and find the intersection point of those lines.
Ratio between the length of an arc and the radius defines the angle between the two radii in radians.
Circumference means the length of the circle, and the interior of the circle is called a disk or disc.
Line cutting a circle in two places is called a secant.
Every triangle gives rise to several circles: its circumcircle containing all three vertices, its incircle lying inside the triangle and touching all three sides, the three excircles lying outside the triangle and touching one side and the extensions of the other two, and its nine point circle which contains various important points of the triangle.


At 12/02/2005 3:10 PM, Anonymous pc30s student said...

Wow! This is crazy, I didn't know any of this! Thanks!


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