9 2 Tangents
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9 2 Tangents

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9 2 Tangents Presentation Transcript

  • 1. 9-2 Tangents
  • 2. Theorem
    • If a line is tangent to a circle then the line is ___________ to the radius drawn to the point of tangency.
    perpendicular
  • 3. Theorem
      • If two segments from the same exterior point are tangent to a circle, then they are congruent.
    S R P T __ __ SR  ST
  • 4. Theorem
      • If a line is  to a radius
      • of a circle at its endpoint
      • on the circle, then the
      • line is tangent to
      • the circle
  • 5. Tangent Circles Two circles that intersect at one point. Externally Tangent
  • 6. Tangent Circles Two circles that intersect at one point. Internally Tangent
  • 7. Common Tangent
    • A line that is tangent to two circles.
      • External - Does NOT cut through the line that connects the circles centers
  • 8. Common Tangent
    • A line that is tangent to two circles.
      • Internal - cuts through the line that connects the circles centers
  • 9. SPICSA
    • 335 2-14 even