Parts of the Circle

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Grade 11 pre-cal

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11 Terms

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Center

Is the point equidistant from the points on the edge

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Radius

The distance between any point on the circle to the center

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Chord

Any segment formed by joining two points on the circle

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Diameter

A chord that passes through the center

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Circumference

The length of the whole circle

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Arc

A portion of the circumference of a circle

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Segment

The region bounded by an arc and a chord

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Sector

The region bounded by two radii and an arc of a circle

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Secant

A line that intersects a circle at exactly two point

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Tangent

A line that intersects a circle at exactly one point

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Central Angle

An angle whose vertex is at the center of a circle and whose sides are radii that intersect the circle.