1. Arc Length and Sector Area

5. How do we get the fraction in these formulas? How many degrees are in a circle? Fraction = (central angle/360)

8. Arc Lengths are PARTS of the total circumference. This part is the fraction of (central angle/360).

10. EXAMPLE Find the length of arc AB

11. Find the length of arc AB and the sector area. After you try these problems, click on the next slide for answers. You may want to put these examples in your notes.

12. Find the length of arc AB and the sector area. A = 104.719 ft 2 A = 4.19 in 2 A = 7.07 m 2 L = 20.94 ft L = 2.09 inL = 4.71 m