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Compassionate

  • one year ago

The area of triangle B is 25 times greater than the area of triangle A.The perimeter of triangle B is how many times greater than the perimeter of triangle A?

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  1. Compassionate
    • one year ago
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    @Ashleyisakitty , @zepdrix

  2. KendrickLamar2014
    • one year ago
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    The scale factor in area is squared. Since the scale factor of the areas are 1:25, you take the square root of both, and your result is the new scale factor.

  3. KendrickLamar2014
    • one year ago
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    Do you have any answer choices?

  4. Compassionate
    • one year ago
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    This isn't a test, so no.

  5. KendrickLamar2014
    • one year ago
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    Ok, well when you take the Square root of 1 and 25 you get the scale factor 1:5, so the answer would be 5 times greater.

  6. Compassionate
    • one year ago
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    I get that, but could you visually expain it

  7. KendrickLamar2014
    • one year ago
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    What do you mean visually?

  8. Compassionate
    • one year ago
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    So, like, could you draw a graph or explain it that way? My mind is melted from studying

  9. KendrickLamar2014
    • one year ago
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    lol ok give me a sec.

  10. KendrickLamar2014
    • one year ago
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    |dw:1432789457119:dw|

  11. KendrickLamar2014
    • one year ago
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    |dw:1432789574114:dw|

  12. rational
    • one year ago
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    |dw:1432789693624:dw|

  13. Compassionate
    • one year ago
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    Thank you

  14. Compassionate
    • one year ago
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    Also, great drawing, @rational

  15. rational
    • one year ago
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    np Heron's formula : \(A = \sqrt{s(s-a)(s-b)(s-c)}\) if you scale each side by a factor of \(k\), the new area would be : \(A' = \sqrt{ks(ks-ka)(ks-kb)(ks-kc)} = \sqrt{k^4s(s-a)(s-b)(s-c)}=k^2A\)

  16. Compassionate
    • one year ago
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    yes

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