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stupidinmath Group Title

how can i find the perimeter of the shaded region? any formula for the arc?

  • 9 months ago
  • 9 months ago

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  1. stupidinmath Group Title
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    • 9 months ago
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  2. Andras Group Title
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    This is very similar to the last question you asked. Where do you get stuck?

    • 9 months ago
  3. stupidinmath Group Title
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    formulas.. :|

    • 9 months ago
  4. stupidinmath Group Title
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    i'm confused if all forulas are same or not

    • 9 months ago
  5. stupidinmath Group Title
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    about the arcs

    • 9 months ago
  6. Andras Group Title
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    I hope now you remember the formula for the perimeter of the circle

    • 9 months ago
  7. Abhishek619 Group Title
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    make use of symmetry..it's helpful

    • 9 months ago
  8. stupidinmath Group Title
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    yep, pi(diameter)

    • 9 months ago
  9. Andras Group Title
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    Yep that is right. What fraction of the circle is the arc you have here?

    • 9 months ago
  10. stupidinmath Group Title
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    1/4

    • 9 months ago
  11. Andras Group Title
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    The other 2 sides are just str8 lines

    • 9 months ago
  12. stupidinmath Group Title
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    yep.. which is equal to 20

    • 9 months ago
  13. Andras Group Title
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    Can you find the solution now? You have written all the necessary information down already

    • 9 months ago
  14. Andras Group Title
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    pi(diameter) is correct for the circle but get used to 2pi(radius), that is a more common notation

    • 9 months ago
  15. stupidinmath Group Title
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    should i use the formul.. l+ 2(pi)(r)(theta/360)?

    • 9 months ago
  16. stupidinmath Group Title
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    i mean l= 2(pi)(r)(theta/360)?

    • 9 months ago
  17. Andras Group Title
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    You do not need that. Just forget the above 2 lines.

    • 9 months ago
  18. Andras Group Title
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    You need the perimeter of the circle: 2pi(radius) and the fraction 1/4

    • 9 months ago
  19. stupidinmath Group Title
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    oh, just that? to get the arc length?

    • 9 months ago
  20. Andras Group Title
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    yep

    • 9 months ago
  21. Andras Group Title
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    That arc length has 1/4 of the perimeter of a full circle

    • 9 months ago
  22. stupidinmath Group Title
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    my answer is.. 35.71.

    • 9 months ago
  23. stupidinmath Group Title
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    thank you so much:)

    • 9 months ago
  24. Andras Group Title
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    Yep that is it

    • 9 months ago
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