Quandaries
and Queries |
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To Whom it concerns: BES |
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Hi, A relationship involving the length of an arc (a), the radius of the circle (r) and the angle at the center of the circle (theta) is
where theta is measured in radians. Let x be the length of the chord and bisect the angle at the center of the circle to get a right triangle ABC as in the diagram.
Since triangle ABC is a right triangle
but a = r theta so
Penny |