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anonymous

  • one year ago

What will be the perimeter and the area of the rectangle below if it is enlarged using a scale factor of 5.5? Perimeter = 50 cm, area = 155.25 cm2 Perimeter = 50 cm, area = 1,452 cm2 Perimeter = 154 cm, area = 155.25 cm2 Perimeter = 154 cm, area = 1,452 cm2 Also, the rectangle is 6 Length and 8 width

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  1. anonymous
    • one year ago
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    |dw:1435288620007:dw|

  2. owlet
    • one year ago
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    Perimeter is the total sum of the side of a polygon. Rectangles perimeter is 2(lengths) + 2(width). The area for the Rectangle is length x width

  3. anonymous
    • one year ago
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    So would I be doing 12 times 18? I don't understand what the 2 means

  4. anonymous
    • one year ago
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    @owlet

  5. anonymous
    • one year ago
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    err 12 times 16 my bad

  6. owlet
    • one year ago
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    For the perimeter: (2 x length) + (2 x width) your length is 6 and your width is 8. yes, 12 and 16 but you have to add these two together and since the question says it is scaled by 5.5 , you have to multiply their sum by 5.5

  7. anonymous
    • one year ago
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    I was multiplying my bad

  8. owlet
    • one year ago
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    it's okay :) so what is 12 + 16?

  9. anonymous
    • one year ago
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    all added together and multiplied by 5.5 is 154

  10. owlet
    • one year ago
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    yes, that's right, so that will be your perimeter. Next is the area which is simply : length x width , what will you get?

  11. anonymous
    • one year ago
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    48 which enlarged by 5.5 is 264

  12. owlet
    • one year ago
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    are you sure? each dimension is enlarge, so it should be: (5.5 x 6) x (5.5 x 8)

  13. anonymous
    • one year ago
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    Thats what i did wrong

  14. anonymous
    • one year ago
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    so the answer is D Thank you

  15. owlet
    • one year ago
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    For the perimeter, it is okay to multiply the answer at the end because we are just adding the dimensions but for the area, we have to multiply each dimension because we need to multiply them. And you're welcome :)

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