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sharon_penn

What is the value of x in the diagram? (1 point) 1/2 4/21 2 4

  • one year ago
  • one year ago

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  1. sharon_penn
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    • one year ago
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  2. tkhunny
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    If those red arrows mean those lines are parallel, we have some similar triangles (AAA). Where does that leave us?

    • one year ago
  3. sharon_penn
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    not real sure :(

    • one year ago
  4. sharon_penn
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    can someone walk me through it?

    • one year ago
  5. sharon_penn
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    please?

    • one year ago
  6. Directrix
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    Theorem: If a line is parallel to one side of a triangle and intersects the other two, then it divides them proportionately.

    • one year ago
  7. Directrix
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    That means: 9 is to (4x - 2) as 12 is to (3x + 2)

    • one year ago
  8. Directrix
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    Or, 9/ (4x - 2) = 12/ (3x + 2) Cross multiply and solve for x.

    • one year ago
  9. Directrix
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    To help you get started, 9(3x + 2) = 12(4x - 2)

    • one year ago
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