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Arc Length & Area of a Sector (3.2)

Arc Length & Area of a Sector (3.2). JMerrill, 2009. Recall: Arc Length. In geometry, an arc length is represented by “s” If any of these parts are unknown, use the formula. s. r. θ. r. Where theta is in radians. You Do: Arc Length.

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Arc Length & Area of a Sector (3.2)

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  1. Arc Length & Area of a Sector (3.2) JMerrill, 2009

  2. Recall: Arc Length • In geometry, an arc length is represented by “s” • If any of these parts are unknown, use the formula s r θ r Where theta is in radians

  3. You Do: Arc Length • A circle has a radius of 15 inches. Find the exact length of the arc intercepted by a central angle of .

  4. Area of a Sector • The area of a circle is given by • The area of a sector (the “piece of the pie”) is given by • (you can also )

  5. Example • Approximate the area of a slice of a 16” pizza that is 1/8 of the whole pie.

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