GEOMETRY- CIRCLES
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8 Terms
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Def of circle
A set of points a given distance from a given point(the center) in a plane
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Def of sphere
A set of points a given distance from a given point(in space not in a plane)
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Central angle
An angle with its vertex at the center of a circle; it is = to its intercepted arc
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Intercepted arc
The arc cut off by and angle of a circle (the angle could be a central<or another<)
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Minor arc
An arc between 0 to 180 degrees in a circle
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Major arc
An arc between 180 to 360 degres
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Circumference formula
C=2pir
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Area formula for a circle
A=nr²