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anonymous

  • 5 years ago

Please see attached.

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  1. anonymous
    • 5 years ago
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  2. anonymous
    • 5 years ago
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    Question 1 or 2?

  3. anonymous
    • 5 years ago
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    \[arc length = 2\pi r(\frac{C}{360})\] where r is the radius and C is the central angle of the arc in degrees

  4. anonymous
    • 5 years ago
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    question 2

  5. anonymous
    • 5 years ago
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    \[sectorarea=\pi r^2 (\frac{C}{360})\]

  6. anonymous
    • 5 years ago
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    Since you know r and C of the 4 different sectors, work them out individually and then add the answers together to get the total area :)

  7. anonymous
    • 5 years ago
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    but each side of the sectors has different lengths

  8. anonymous
    • 5 years ago
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    you use the values that involve that sector. for example the sector with the 120 angle with be a side of OB=3cm as a value for r

  9. anonymous
    • 5 years ago
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    for the 45 degree one the sides will be OC=5cm

  10. anonymous
    • 5 years ago
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    the 60 degree will be )A=2cm and the last one (135 degree) is OD=3cm

  11. anonymous
    • 5 years ago
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    does this make more sense? :D

  12. anonymous
    • 5 years ago
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    is OC part of sector 120 degree or 45 degree???

  13. anonymous
    • 5 years ago
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    OC is only a part of the 45 degree sector

  14. anonymous
    • 5 years ago
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    I think I need to read up on sectors.

  15. anonymous
    • 5 years ago
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    thanks for your help

  16. anonymous
    • 5 years ago
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    I think it might have to do with the diagram, it is a little confusing. No worries (:

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