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anonymous

  • one year ago

A source of laser light sends rays AB and AC toward two opposite walls of a hall. The light rays strike the walls at points B and C, as shown below: What is the distance between the walls?

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    do you know the rules for 30-60-90 and 45-45-90 triangles?

  3. anonymous
    • one year ago
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    no, i really dont know anything about this

  4. anonymous
    • one year ago
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    |dw:1434119310670:dw|

  5. anonymous
    • one year ago
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    |dw:1434119573838:dw|

  6. anonymous
    • one year ago
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    your picture has a 30-60-90 triangle on the left. The hypotenuse, 2x = 60. Solve for x to find the distance from the left wall to the laser

  7. anonymous
    • one year ago
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    would it be 80?

  8. anonymous
    • one year ago
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    no, how did you get 80?

  9. anonymous
    • one year ago
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    wait 2x=60 would be 30

  10. anonymous
    • one year ago
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    right, so from the left wall to point A is 30. Now find the distance from A to the right wall

  11. anonymous
    • one year ago
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    |dw:1434120206978:dw|

  12. anonymous
    • one year ago
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    would it be 40 from A to the right wall?

  13. anonymous
    • one year ago
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    yes

  14. anonymous
    • one year ago
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    so then my whole answer would be 70?

  15. anonymous
    • one year ago
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    right

  16. anonymous
    • one year ago
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    thank you

  17. anonymous
    • one year ago
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    you're welcome

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