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Sirlw Group Title

how do you find the surface area of a cylinder? Ex: r=4 width(across)=21

  • 2 years ago
  • 2 years ago

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  1. Sirlw Group Title
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    dont you have to do some king of net

    • 2 years ago
  2. Sirlw Group Title
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    *kind

    • 2 years ago
  3. hoblos Group Title
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    area = 2pi*r^2 + 2pi*r*h

    • 2 years ago
  4. Sirlw Group Title
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    i kno but

    • 2 years ago
  5. Sirlw Group Title
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    for the rectangle it gives u only one number

    • 2 years ago
  6. Sirlw Group Title
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    wait for the rectangle its pi*r=?*h=hight

    • 2 years ago
  7. Sirlw Group Title
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    whats r? radius?

    • 2 years ago
  8. Sirlw Group Title
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    but i thought for rectangle it was like height times width or the other side

    • 2 years ago
  9. hoblos Group Title
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    the area of the rectangle here = perimeter of the circle multiplied by the height since the perimeter actually its width

    • 2 years ago
  10. Sirlw Group Title
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    so the area of rectangle is the circumference of circle times the hieght?

    • 2 years ago
  11. hoblos Group Title
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    yup

    • 2 years ago
  12. Sirlw Group Title
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    in a book it said (pi d ) h

    • 2 years ago
  13. Sirlw Group Title
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    hmm ohmygod ur rite

    • 2 years ago
  14. Sirlw Group Title
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    THANKS YOU SO MOAUCH

    • 2 years ago
  15. hoblos Group Title
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    yeah you know that 2r=d

    • 2 years ago
  16. Sirlw Group Title
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    ye

    • 2 years ago
  17. hoblos Group Title
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    my pleasure XD

    • 2 years ago
  18. Sirlw Group Title
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    :)

    • 2 years ago
  19. sfozturk61 Group Title
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    2(pi)rh+2(pi)r^2 is its surface

    • 2 years ago
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