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Flapdragon Group Title

What is the area of a sector with a central angle of 190° and a diameter of 5.1 cm?

  • 2 years ago
  • 2 years ago

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  1. jerwyn_gayo Group Title
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    i think the given are enough to solve the problem. . do you know the formula?

    • 2 years ago
  2. jerwyn_gayo Group Title
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    area= r^2(theta) ; where theta is expressed in the radian form. .

    • 2 years ago
  3. Chlorophyll Group Title
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    (5.1/2)² *190 * pi/ 360 = 10.8 =

    • 2 years ago
  4. Chlorophyll Group Title
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    My PC so slow that by the time I respond to you, you already gone :P

    • 2 years ago
  5. jerwyn_gayo Group Title
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    @chlorophyyll. i think it's not pi/360, but, pi/180.

    • 2 years ago
  6. Chlorophyll Group Title
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    I check the other sources, it says 1/2 of pi/180 --> pi/260

    • 2 years ago
  7. Flapdragon Group Title
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    Oh, okay. That clears it up, thanks. I had my answer written down, but I wasn't sure if I was doing it right. c:

    • 2 years ago
  8. jerwyn_gayo Group Title
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    in changing degrees to radian it pattern the formula. degree ( pi/180 deg). trigonometry fact.

    • 2 years ago
  9. Chlorophyll Group Title
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    Don't be confused between arc length and area sector!

    • 2 years ago
  10. jerwyn_gayo Group Title
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    can you give me a link of your reference?

    • 2 years ago
  11. Chlorophyll Group Title
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    http://www.worsleyschool.net/science/files/sector/calculations.html

    • 2 years ago
  12. jerwyn_gayo Group Title
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    @chlorophyll, thanks. .

    • 2 years ago
  13. Chlorophyll Group Title
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    http://www.wyzant.com/Help/Math/Geometry/Areas/Circles_and_Sectors.aspx

    • 2 years ago
  14. Chlorophyll Group Title
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    I check multi sources all the times, because I'm confused and very absent minded :(

    • 2 years ago
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