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anonymous

  • one year ago

I need help with this question. It is similarity

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    question 3

  3. anonymous
    • one year ago
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    the answer for 3a. is 15:16, 225:256

  4. anonymous
    • one year ago
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    and for 3b. 1:20, 1:400

  5. anonymous
    • one year ago
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    \[\frac{ 7 }{ 0.875 } = \frac{ x }{ 0.7 }\]

  6. anonymous
    • one year ago
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    where did u get 0.7

  7. anonymous
    • one year ago
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    oh wait i did your question 4

  8. anonymous
    • one year ago
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    lel

  9. anonymous
    • one year ago
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    oh its only questions 3

  10. anonymous
    • one year ago
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    This is wat i did, but it is not the same as the answer

  11. anonymous
    • one year ago
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    because \[(\frac{ 0.875 }{ 7 } ) ^3 = \frac{ 1 }{ 512 }\]

  12. anonymous
    • one year ago
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    where did u get 512

  13. anonymous
    • one year ago
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    calculator

  14. anonymous
    • one year ago
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    0.875 divide by 7 then cube

  15. anonymous
    • one year ago
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    ohhh

  16. anonymous
    • one year ago
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    but why do i need to do that

  17. anonymous
    • one year ago
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    you did your\[(\frac{ s_1 }{ s_2 })^3\]the wrong way

  18. anonymous
    • one year ago
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    how can\[(\frac{ 0.875 }{ 7 })^3 = 1/2\]

  19. anonymous
    • one year ago
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    no i want to find the ratio for the sides which is s1/s2

  20. anonymous
    • one year ago
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    so I cube root the volume

  21. anonymous
    • one year ago
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    i know but you made a calculation error there

  22. anonymous
    • one year ago
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    but \[\sqrt[3]{\frac{ 0.875 }{ 7}} = \frac{ 1 }{ 2}\]

  23. anonymous
    • one year ago
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    yup

  24. anonymous
    • one year ago
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    then why is it a calculation error

  25. anonymous
    • one year ago
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    i thought you cube that 0.875/7

  26. anonymous
    • one year ago
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    ohhhh

  27. anonymous
    • one year ago
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    anyways so I found the ratio of a side on the smaller solid to the corresponding side on the larger solid which is 1:2 but the answers say that it is 15:16

  28. anonymous
    • one year ago
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    they are asking for ratio of surface area

  29. anonymous
    • one year ago
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    not ratio of sides

  30. anonymous
    • one year ago
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    weird stuff!

  31. anonymous
    • one year ago
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    it says to do both

  32. anonymous
    • one year ago
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    if the ratio of side is 15/16 then ratio of area is (15/16)^2

  33. anonymous
    • one year ago
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    why?

  34. anonymous
    • one year ago
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    http://www.bbc.co.uk/schools/gcsebitesize/maths/geometry/congruencysimilarityrev4.shtml

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