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superhelp101

  • one year ago

The triangles below are all equilateral and each smaller triangle has a side length half that of the next larger. If the pattern continues, what is the total perimeter of all the triangles? I keep getting 21, but its wrong :(

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  1. superhelp101
    • one year ago
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    @Compassionate :)

  2. superhelp101
    • one year ago
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    |dw:1432788819070:dw|

  3. random231
    • one year ago
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    total perimeter of these three triangles is no doubt 21

  4. superhelp101
    • one year ago
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    ikr! I don't understand my teacher marked it wrong :(

  5. random231
    • one year ago
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    but i think whats asked in the question is the sum of all the triangles following this pattern. Which means you have a infinite GP series

  6. superhelp101
    • one year ago
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    so is that |dw:1432789511714:dw|

  7. random231
    • one year ago
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    yup!!

  8. superhelp101
    • one year ago
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    i got -3

  9. random231
    • one year ago
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    nope

  10. superhelp101
    • one year ago
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    :(

  11. random231
    • one year ago
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    |dw:1432789886420:dw|

  12. random231
    • one year ago
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    try this ^^^^

  13. superhelp101
    • one year ago
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    but where would the 1/2 go cuz its n

  14. superhelp101
    • one year ago
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    nevermind! 8

  15. superhelp101
    • one year ago
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    right ? :/

  16. random231
    • one year ago
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    bullseye :))

  17. superhelp101
    • one year ago
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    so 8 is the total perimeter?

  18. random231
    • one year ago
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    yeah i think thats the answer!! :)

  19. superhelp101
    • one year ago
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    Thank you! :)))))) :DD

  20. random231
    • one year ago
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    youre welcome!!

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