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Monday, November 4 th

Monday, November 4 th. Warm Up. Fill in the blank A chord is a segment whose __________are on the circle A secant line intersects the circle__________. Vocab Review. Find the diameter or radius for each circle. D =. 24. 32. 12. r = ?. 16. r =. 4.5. 6. D =. 12. 9. Q. R. P.

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Monday, November 4 th

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  1. Monday, November 4th Warm Up Fill in the blank A chord is a segment whose __________are on the circle A secant line intersects the circle__________.

  2. Vocab Review

  3. Find the diameter or radius for each circle D = 24 32 12 r = ? 16 r = 4.5 6 D = 12 9

  4. Q R P S T Use P to determine whether each statement is true or false.

  5. Secant Line: intersects the circle at exactly TWO points SECANT sounds like second

  6. Tangent Line: a LINE that intersects the circle exactly ONE time Forms a ______angle

  7. Name the term that best describes the notation. Secant Radius Diameter Chord Tangent

  8. Central Angles

  9. Angle measure of a line A line measures 180˚ Supplementary angles = 180˚ Find x 20˚ x˚ P

  10. Angle measure of a line Find x 20˚ x˚ 30˚ P

  11. Angle measure of a line Find x 4x+2˚ x˚ P

  12. Central Angle : An Angle whose vertex is at the center of the circle ACB AB A Major Arc Minor Arc More than 180° Less than 180° P To name: use 3 letters C To name: use 2 letters B <APB is a Central Angle

  13. EDF Semicircle: An Arc that equals 180° To name: use 3 letters E D P F

  14. measure of an arc = measure of central angle m ACB m AB m AE A E 96 Q B C 96° = = 264° 84° =

  15. Arc Addition Postulate m ABC = m AB + m BC A C B

  16. m DAB = Tell me the measure of the following arcs. 240 D A 140 260 m BCA = R 40 100 80 C B

  17. CONGRUENT ARCS Congruent Arcs have the same measure and MUST come from the same circle or of congruent circles. C B D 45 45 110 A Arc length is proportional to “r”

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