Science Fair Project Encyclopedia
Chord (geometry)
A chord of a curve is a geometric line segment whose endpoints both lie on the curve. A secant or a secant line is the line extension of a chord.
Chords of a circle
Chords of a circle have a few known properties. Here's an incomplete list:
- Chords are equidistant from the center if and only if their lengths are equal.
- A chord's perpendicular bisector passes the center.
- Given chord AB, chord CD, and intersection point P of the line extensions (secant lines) of them, the following about lengths is true: AP·PB = CP·PD (Power of a point theorem )
Last updated: 08-04-2005 16:53:53
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details