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Geometry Section 10.1 Segments and Lines of Circles

Geometry Section 10.1 Segments and Lines of Circles. A * circle is a set of points, in a plane, that are equidistant from a given point.

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Geometry Section 10.1 Segments and Lines of Circles

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  1. Geometry Section 10.1Segments and Lines of Circles

  2. A *circle is a set of points, in a plane, that are equidistant from a given point.

  3. This given point is called the ______of the circle. A circle can be named by using the symbol _____ and naming the center of the circle. The circle to the right is _____. center

  4. A *radius (plural: radii) is a segment from the center to any point on the circle. EXAMPLE : HI

  5. Note: Two circles are congruent iftheir radii are congruent.

  6. A *chordis a segment whose two endpoints are on the circle. EXAMPLE : SE

  7. A *diameteris a chord which passes through the center of the circle.

  8. Note: The length of a diameter equals 2 times the length of a radius. Name the Diameter: MC

  9. A line in the plane of a circle may or may not intersect the circle. There are 3 possibilities.

  10. A *secant to a circleis a line which intersects the circle in 2 points.Note: Every secant will contain a chord. Be sure to include the proper symbol for a segment or line when naming chords or secants.

  11. Secant Tangent Secants are LINES. Chords are SEGMENTS.

  12. A *tangent to a circleis a line, in the plane of the circle, that intersects the circle in exactly one point. The word TANGENT means one intersection.

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