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Chapter 2 Section 1
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Figure: A ray or half-line
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Figure
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Figure: Standard position of an angle
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Figure
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Figure
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Example
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Example 1 Solution
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Solution b. Figure 7: -90° angle a. Figure 6: 45° angle
c. Figure 8: 225° angle d. Figure 9: 405° angle
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Figure: Radians
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Find the Length of an Arc of a Circle
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Figure:
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Theorem
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Example
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Solution
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Convert from Degrees to Radians and from Radians to Degrees
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Figure 1 revolution = 2π radians
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Example
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Solution
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Example
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Solution
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Table: Commonly encountered angles
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Find the Area of a Sector of a Circle
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Figure: Sector of a Circle
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Figure:
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Theorem
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Example
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Solution
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