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anonymous

  • one year ago

A running track in the shape of an oval is shown. The ends of the track form semicircles

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  1. anonymous
    • one year ago
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    What is the perimeter of the inside of the track? (π = 3.14)

  2. anonymous
    • one year ago
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  3. anonymous
    • one year ago
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    Are you looking for perimeter or area?

  4. anonymous
    • one year ago
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    perimeter...im really bad at math :b

  5. anonymous
    • one year ago
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    I am too. I'm not sure how to answer this sorry

  6. anonymous
    • one year ago
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    Every perfectionist was once a beginner.. :)

  7. anonymous
    • one year ago
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    its ok :)

  8. anonymous
    • one year ago
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    Well good luck! :)

  9. anonymous
    • one year ago
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    That track is made up of Rectangle and two semicircles..

  10. mathstudent55
    • one year ago
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    |dw:1437508710133:dw|

  11. anonymous
    • one year ago
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    If the semicircle is having same radius then two semicircle = 1 cirle..

  12. anonymous
    • one year ago
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    ok

  13. anonymous
    • one year ago
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    But you need to find the perimeter of inside track, so go with mathstudent55..

  14. anonymous
    • one year ago
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    ok then thx

  15. mathstudent55
    • one year ago
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    The track is made up of 2 line segments each 130 m long. Then the track also is made up of 2 semicircles. Two semicircles combine to form one circle. P = 130 m + 130 m + circumference of circle. To find the circumference of the circle use the formula, \(C = \pi d\) You are given d, the diameter as 56 m.

  16. anonymous
    • one year ago
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    you can notice that inner track diameter is 56m...

  17. mathstudent55
    • one year ago
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    \(P = 130 m + 130 m + \pi \times 56 m\)

  18. anonymous
    • one year ago
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    so now do i do pie times diameter?

  19. anonymous
    • one year ago
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    ok thank you so much! @mathstudent55 and u too :) @waterineyes

  20. anonymous
    • one year ago
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    would my answer be 435.84?

  21. mathstudent55
    • one year ago
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    Yes. pi * diameter is the full circle's circumference. Then you add that to 130 + 130.

  22. mathstudent55
    • one year ago
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    Correct.

  23. anonymous
    • one year ago
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    ok thank you!

  24. mathstudent55
    • one year ago
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    You're welcome.

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