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gabbyalicorn

  • one year ago

Figure WXYZ is a rectangle with a semicircle added to its base. What is the perimeter of figure WXYZ? Use 3.14 to approximate pi.

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  1. gabbyalicorn
    • one year ago
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    https://www.dropbox.com/s/ui585xtxxq7uxhw/Screenshot%202015-06-16%2022.34.24.png?dl=0

  2. Michele_Laino
    • one year ago
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    here we have: |dw:1434519353960:dw|

  3. gabbyalicorn
    • one year ago
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    3.14 x (semi circle)?

  4. gabbyalicorn
    • one year ago
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    no, it says add

  5. gabbyalicorn
    • one year ago
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    my first thought was 3.14 x 8 but that's probably not it

  6. Michele_Laino
    • one year ago
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    the requested perimeter is equal to this sum: \[\begin{gathered} {\text{sum of the length of linear segments + }} \hfill \\ {\text{ + length of half circle}} = \hfill \\ = 7 + 16 + 7 + \left( {3.14 \times 8} \right) \hfill \\ \end{gathered} \]

  7. gabbyalicorn
    • one year ago
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    i got 265.12

  8. Michele_Laino
    • one year ago
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    hint: \[\begin{gathered} {\text{sum of the length of linear segments + }} \hfill \\ {\text{ + length of half circle}} = \hfill \\ = 7 + 16 + 7 + \left( {3.14 \times 8} \right) = \hfill \\ = 16 + 14 + 25.12 = ... \hfill \\ \end{gathered} \]

  9. gabbyalicorn
    • one year ago
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    55.12

  10. Michele_Laino
    • one year ago
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    that's right!

  11. gabbyalicorn
    • one year ago
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    :D Yay! Thank you!

  12. Michele_Laino
    • one year ago
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    :)

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