Circles Lesson 4 April 30 09

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Circles Lesson 4 April 30 09

  1. 1. .Q .P
  2. 2. Tangent Theorem:  ­ a tangent to a circle is perpendicular to   the radius at the point of tangency. ­ the tangent segments to a circle from any   external point are congruent. 
  3. 3. Find the value of x. A 10 5 O x P
  4. 4. Tangent Chord Theorem:  ­ The angle between a tangent and a chord    is equal to the inscribed angle on the     opposite side of the chord.
  5. 5. B Find the measure of angles 1 and 2 2 . E A 1 O o 64 o 71 C D

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