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Thread: Trig-trouble

  1. #1
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    Trig-trouble

    Hi everyone,

    I've got a little trig-trouble here..

    Trig-trouble-immagine.png

    What I know:

    AB = 8 [mm]
    CD = 1 [mm]
    DE = 2 [mm]
    EF = 4 [mm]
    FG = 5 [mm]
    HA = 10 [mm]
    ABC = 100 []
    BCD = 90 []
    DEF = 90 []
    EFG = 90 []
    GHA = 130 []
    HAB = 60 []

    I need to calculate the distance AE. Any idea?

    Thanks in advance!

    B.
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  2. #2
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    Re: Trig-trouble

    Well, too many "points...angles...lines" for me to refer to without a schoolroom blackboard!

    Here's a hint:
    Draw perpendicular HK (K on AB) to AB;
    right triangle AHK = 30-60-90, so AK = 5.

    Good luck...
    Thanks from balan
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  3. #3
    Forum Admin topsquark's Avatar
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    Re: Trig-trouble

    Quote Originally Posted by DenisB View Post
    Well, too many "points...angles...lines" for me to refer to without a schoolroom blackboard!

    Here's a hint:
    Draw perpendicular HK (K on AB) to AB;
    right triangle AHK = 30-60-90, so AK = 5.

    Good luck...
    Angle HAB is 60 degrees, not angle HAE.

    But you're right. This thing needs a blackboard to do it properly. If I had a CAD program I might try it.

    -Dan
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  4. #4
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    Re: Trig-trouble

    Quote Originally Posted by topsquark View Post
    Angle HAB is 60 degrees, not angle HAE.
    True...BUT what I did is still correct...it simply is a POOR hint!!
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