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Warm-up

Warm-up. 1) Find the circumference and area of a circle with a diamater of 10 in. 2) What would be the radius of a circle if it’s area is ?. C = 31.42 in., A = 78..54 in. 2. radius = 8. Homework Review. 2) 2 4) AB=16, DE=17 6) AB=32, DE=24 8) 6 10) RT=20, TV=16 12) RT=36, TV=27

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Warm-up

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  1. Warm-up • 1) Find the circumference and area of a circle with a diamater of 10 in. • 2) What would be the radius of a circle if it’s area is ? C = 31.42 in., A = 78..54 in.2 radius = 8

  2. Homework Review 2) 2 4) AB=16, DE=17 6) AB=32, DE=24 8) 6 10) RT=20, TV=16 12) RT=36, TV=27 14) 12 16) 18 28) 14.2 ft.

  3. Math II UNIT QUESTION: What special properties are found with the parts of a circle? Standard: MM2G1, MM2G2 Today’s Question: How do we find arc length and area of sectors using proportions? Standard: MM2G3.c

  4. 6.7 Circumference and Arc Length

  5. Circumference Distance around the circle

  6. Circumference 2 p r = C or dp = C

  7. Find the circumference. 33 m 14.3 in. 103.7 m

  8. Arc Length Portion of the circumference A P B

  9. Find the circumference Find the arc length 5cm 3.82 m 50º 60º 22.92 m 4.36 cm

  10. Practice! Wkbk 6.7

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