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Flapdragon

  • 2 years ago

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

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  1. jerwyn_gayo
    • 2 years ago
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    i think the given are enough to solve the problem. . do you know the formula?

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

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

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

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

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

  7. Flapdragon
    • 2 years ago
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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:

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

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

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

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

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

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

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

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