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4.4a:Areas of Circles & Sectors and Arc Length

4.4a:Areas of Circles & Sectors and Arc Length. Area of a Circle –. A = r 2. Sector of a Circle. The region bounded by 2 radii & their intercepted arc. Sector Also a sector Visually, it might remind you of a slice of pizza or a piece of pie. Area of a Sector :.

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4.4a:Areas of Circles & Sectors and Arc Length

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  1. 4.4a:Areas of Circles & Sectors and Arc Length

  2. Area of a Circle – A = r2

  3. Sector of a Circle • The region bounded by 2 radii & their intercepted arc. Sector Also a sector • Visually, it might remind you of a slice of pizza or a piece of pie.

  4. Area of a Sector : Area of a full circle * the part of the circle your looking at

  5. Ex1: Find the area of the small sector shown. 135o 11 m

  6. Ex. 2: Finding the area of a sector • Find the area of the sector shown below. Sector CPD intercepts an arc whose measure is 80°. The radius is 4 ft. m A = • r2 360°

  7. Ex3: L & M are 2 pts. on a circle R with r=50 cm & mLRM=150o. Find the areas of the sectors formed by LRM. II R 50 cm L 150o M I

  8. Arc Length What is the circumference of circle A ? What is the arc length of just BC?

  9. Find the length of TBG

  10. Mr. Ruhle enjoys his pizza. The giant pizza has 16 equal slices, and has a diameter of 4 feet. What is the length of the crust on the piece Mr. Ruhle is holding? http://fatkidatcamp.com/wp-content/uploads/2010/04/giant-pizza.jpg

  11. Assignment

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