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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 4.5? Perimeter = 46 cm, area = 131.25 cm2 Perimeter = 126 cm, area = 972 cm2 Perimeter = 46 cm, area = 972 cm2 Perimeter = 126 cm, area = 131.25 cm2

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    @Study_together @welshfella @hotguy @Vocaloid

  3. Study_together
    • one year ago
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    This link might help.. http://openstudy.com/study#/updates/552d2848e4b0b938367eb73b

  4. Vocaloid
    • one year ago
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    "enlarged by a scale factor of 4.5" means that the length and width each get multiplied by 4.5 old length = 8 old width = 6 new length = 4.5*(old length) = __ ? new width = 4.5*(old width) = __ ?

  5. Study_together
    • one year ago
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    You just multiply area and the perimeter by 4.5

  6. anonymous
    • one year ago
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    okayy so it would be new width would be 27 the new length is 36

  7. Study_together
    • one year ago
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    @Vocaloid you didn't multiply the area

  8. Study_together
    • one year ago
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    And the same with the area...

  9. Vocaloid
    • one year ago
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    @liana1036 right! the new width is 27 and the new length is 36 perimeter = 2(new width + new length) = ?

  10. Study_together
    • one year ago
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    Hope it helps

  11. anonymous
    • one year ago
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    126

  12. Vocaloid
    • one year ago
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    good! area = (new length)*(new width) = ?

  13. Study_together
    • one year ago
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    Yes

  14. Study_together
    • one year ago
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    good

  15. anonymous
    • one year ago
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    972

  16. Vocaloid
    • one year ago
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    excellent!

  17. Study_together
    • one year ago
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    Yep, you got it

  18. anonymous
    • one year ago
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    Thanks to the both of you c:

  19. Vocaloid
    • one year ago
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    shortcut method: new perimeter = 4.5*(old perimeter) new area = 4.5*4.5*(old area)

  20. Study_together
    • one year ago
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    np :)

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