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Mathematics 17 Online
OpenStudy (dontknowdontcare):

Prove that a line parallel to one side of a triangle divides the other two sides proportionally. Be sure to create and name the appropriate geometric figures.

Directrix (directrix):

Is this a proof from scratch? That is, nothing given other than the theorem to be proved.

OpenStudy (dontknowdontcare):

I honestly don't know I'm totally stumped on this. I do FLVS and this was the question

Directrix (directrix):

Okay. We'll be proving the Triangle Proportionality Theorem.

OpenStudy (dontknowdontcare):

Okay, so we are writing a proof.

Directrix (directrix):

Given: △ RST; Line PQ // Line RS Prove: RP/PT = SQ/QT |dw:1455763610295:dw|

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