anonymous
  • anonymous
Triangle trouble. Please Help.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
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.
anonymous
  • anonymous
I'm not looking for direct answers, I'd just appreciate a nudge or two.
anonymous
  • anonymous
Oh?

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anonymous
  • anonymous
A double negation, yeah? Isn't that basically indirectly proving?
anonymous
  • anonymous
Wouldn't that rely on the lines being parallel?
anonymous
  • anonymous
Oh, I see what you mean
anonymous
  • anonymous
Hmmm...
nincompoop
  • nincompoop
where is the question?
anonymous
  • anonymous
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.
nincompoop
  • nincompoop
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anonymous
  • anonymous
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.
nincompoop
  • nincompoop
|dw:1439612988064:dw|
nincompoop
  • nincompoop
|dw:1439613010726:dw|
nincompoop
  • nincompoop
|dw:1439613035556:dw|
nincompoop
  • nincompoop
|dw:1439613056284:dw|
anonymous
  • anonymous
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.
nincompoop
  • nincompoop
we can start with one type of triangle like right-triangle and then use tangent ratio and prove
nincompoop
  • nincompoop
|dw:1439613213796:dw|
anonymous
  • anonymous
Do you see what I'm saying? Is that process flawed?
nincompoop
  • nincompoop
|dw:1439613243727:dw|
nincompoop
  • nincompoop
ya you can use that or start with that similar triangles provide congruence
anonymous
  • anonymous
It seems the least convoluted way I've thought.
anonymous
  • anonymous
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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