Chapter 12 Circles: Lines, Segments, and Angles

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Chapter 12Circles Lines, Segments, and Angles

• Section 12.1 Tangents to Circles

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Secant

• A line that intersects a circle at 2 points

NO
YES
NO
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Tangent

• A line that intersects a circle at 1 point

NO
YES
NO
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Common Tangent
Internal
External
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Tangent Circles
Internal
External
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Explore Pg. 663

• Circle Template
• Pencil
• Protractor

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• If a line/segment/ray is tangent to a circle then
  it is perpendicular to the radius at the point of
  tangency.

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Example
Given PR is tangent to circle Q Find the Radius
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Example
Is SR tangent to circle T?
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Given PS and PR are tangent to circle Q What
information do we now know?
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Example
Given PS and PR are tangent circle Q Find x
and y
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Homework

• 12.1 WKS