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horsegal244

  • one year ago

What will be the perimeter and the area of the rectangle below if it is enlarged using a scale factor of 7.5? Will give medals!

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  1. horsegal244
    • one year ago
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  2. eyust707
    • one year ago
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    If we enlarge something "to scale" or "by a factor" or "using a scale factor" we simply multiply each side of the object by the same amount, by the factor. In this case the scale factor is 7.5 so multiply each side by 7.5 and we will get a new rectangle with longer sides. 6*7.5 = 45 8 * 7.5 = 60 |dw:1437408705943:dw| What is the area and perimeter of this larger, "scaled" rectangle?

  3. horsegal244
    • one year ago
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    ummmmm i don't get it

  4. AaronAndyson
    • one year ago
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    Area = lw Perimeter = 2(l + w)

  5. AaronAndyson
    • one year ago
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    Since it is "increased/enlarged " using "scale factor" We can, safely,do this: 6*7.5 and 8*7.5

  6. AaronAndyson
    • one year ago
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    6*7.5 = 45 8*7.5 = 60

  7. AaronAndyson
    • one year ago
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    Perimeter = 2(l + w)=2(45 + 60) = 2(105) = 210cm Area = lw = 45*60 = 2700cm^2

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