1. Holt Geometry 11-3 Sector Area and Arc Length 11-3 Sector Area and Arc Length Holt Geometry Warm Up Warm Up Lesson Presentation Lesson Presentation Lesson Quiz Lesson Quiz

2. Holt Geometry 11-3 Sector Area and Arc Length Warm Up Find w, y, and z. Give the answers in simplest radical form.

3. Holt Geometry 11-3 Sector Area and Arc Length Find the area of sectors. Find the area of segments. Objectives

4. Holt Geometry 11-3 Sector Area and Arc Length sector of a circle segment of a circle Vocabulary

5. Holt Geometry 11-3 Sector Area and Arc Length Note 71

6. Holt Geometry 11-3 Sector Area and Arc Length Write the degree symbol after m in the formula to help you remember to use degree measure not arc length. Helpful Hint

7. Holt Geometry 11-3 Sector Area and Arc Length Find the area of each sector. Give answers in terms of . Example 1A: Finding the Area of a Sector sector HGJ

8. Holt Geometry 11-3 Sector Area and Arc Length Check It Out! Example 1a Find the area of each sector. Give your answer in terms of . sector ACB

9. Holt Geometry 11-3 Sector Area and Arc Length Check It Out! Example 1b Find the area of each sector. Give your answer in terms of . sector JKL

10. Holt Geometry 11-3 Sector Area and Arc Length A windshield wiper blade is 18 inches long. To the nearest square inch, what is the area covered by the blade as it rotates through an angle of 122°? Example 2: Automobile Application

11. Holt Geometry 11-3 Sector Area and Arc Length A segment of a circle is a region bounded by an arc and its chord.

12. Holt Geometry 11-3 Sector Area and Arc Length Find the area of segment LNM to the nearest hundredth. Example 3: Finding the Area of a Segment

13. Holt Geometry 11-3 Sector Area and Arc Length Check It Out! Example 3 Find the area of segment RST to the nearest hundredth.

14. Holt Geometry 11-3 Sector Area and Arc Length Exit Slip Find each measure. Give answers in terms of . 1. area of sector LQM 7.5 in 2  23.56 in 2 2. Find the area of segment GHJ to the nearest hundredth.  55.94 m 2