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anonymous

  • one year ago

Triangle trouble. Please Help.

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  1. anonymous
    • one year ago
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    Prove that a line that divides two sides of a triangle proportionally is parallel to the third side. Be sure to create and name the appropriate geometric figures.

  2. anonymous
    • one year ago
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    I'm not looking for direct answers, I'd just appreciate a nudge or two.

  3. anonymous
    • one year ago
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    Oh?

  4. anonymous
    • one year ago
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    A double negation, yeah? Isn't that basically indirectly proving?

  5. anonymous
    • one year ago
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    Wouldn't that rely on the lines being parallel?

  6. anonymous
    • one year ago
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    Oh, I see what you mean

  7. anonymous
    • one year ago
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    Hmmm...

  8. nincompoop
    • one year ago
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    where is the question?

  9. anonymous
    • one year ago
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    Sorry, Prove that a line that divides two sides of a triangle proportionally is parallel to the third side. Be sure to create and name the appropriate geometric figures.

  10. nincompoop
    • one year ago
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    |dw:1439612972253:dw|

  11. anonymous
    • one year ago
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    It's not a question, it's a command. That's all that's given. I think I'm proving the converse of the triangle proportionality theorem.

  12. nincompoop
    • one year ago
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    |dw:1439612988064:dw|

  13. nincompoop
    • one year ago
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    |dw:1439613010726:dw|

  14. nincompoop
    • one year ago
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    |dw:1439613035556:dw|

  15. nincompoop
    • one year ago
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    |dw:1439613056284:dw|

  16. anonymous
    • one year ago
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    Ooh I could probably say the triangles are similar, thus having congruent angles, then say by extension or by that they're exterior or interior angles or whatever that they're parallel.

  17. nincompoop
    • one year ago
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    we can start with one type of triangle like right-triangle and then use tangent ratio and prove

  18. nincompoop
    • one year ago
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    |dw:1439613213796:dw|

  19. anonymous
    • one year ago
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    Do you see what I'm saying? Is that process flawed?

  20. nincompoop
    • one year ago
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    |dw:1439613243727:dw|

  21. nincompoop
    • one year ago
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    ya you can use that or start with that similar triangles provide congruence

  22. anonymous
    • one year ago
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    It seems the least convoluted way I've thought.

  23. anonymous
    • one year ago
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    Could I use the converse(inverse maybe? I forget) of the corresponding angles theorem after saying they're similar to prove parallelism?

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