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Warm-Up 8/19

Warm-Up 8/19. Convert Angle to the other measurement 1. – 150  2. = 45. Q&A on assignment. Rigor: You will learn how to find Arc Length, Linear and Angular Speed plus the Area of a Sector . Relevance: You will be able to use angle measure to solve application problem.

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Warm-Up 8/19

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  1. Warm-Up 8/19 Convert Angle to the other measurement 1. – 150 2. = 45 Q&A on assignment.

  2. Rigor:You will learn how to find Arc Length, Linear and Angular Speed plus the Area of a Sector .Relevance:You will be able to use angle measure to solve application problem.

  3. 4-2b Degrees and Radians

  4. Example 4: Find the length of the intercepted arc given central angle and radius. Round to the nearest tenth. a. , r = 4 in. b. 125, r = 7cm

  5. = 2  Revolutions Linear Speed applies to any object that moves. Angular Speed applies to objects that rotate.

  6. = 2  Revolutions Example 5: Find the rotation in revolutions per minute given the angular speed. a. Find the radius given the linear speed and the rate of rotation. b.

  7. Area of a Sector The area A of a sector of a circle with radius r and central angle  is where  is measures in radians.

  8. Example 6: Find Area of Sector.

  9. math! • 4-2a Assignment: TX p238, 27-39 odd + 43-47 odd • Unit 1 Test • Thursday 8/22

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