Circles Section 1'7 SLU Mat 151

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Circles Section 1.7 SLU Mat 151
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Section 1.7 - Circles

• Def Given a point C and a positive real number
  r, a circle with center C and radius r is the
  collection of all points in the plane that are r
  units away from the point C.

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Section 1.7 - Circles

• Def If the center of a circle is C(h, k),
• and the radius of the circle is r, then
• the standard form of the equation of
• this circle is

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Section 1.7 - Circles

• Example 1 Write down the standard
• form of the equation of the circle with
• center (0, 0) and radius 21. Then graph
• this circle.

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Section 1.7 - Circles

• Example 2 Write down the standard
• form of the equation of the circle with
• center (3, -5) and radius 2. Then graph
• this circle.

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Section 1.7 - Circles

• Example 3 State the center and the
• radius of the circle with equation

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Section 1.7 - Circles

• Example 4 State the center and the
• radius of the circle with equation

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Section 1.7 - Circles

• Example 5 State the center and the
• radius of the circle with equation

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Section 1.7 - Circles

• Resource
• PreCalculus with Unit-Circle Trigonometry
• by David Cohen