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Math Help - Obtuse Triangles - Help with drawing!

  1. #1
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    Obtuse Triangles - Help with drawing!

    Hi, I received this question today. I need help with the placement of the 120 degree angle and 20 degree angle. The wording is confusing. Any help is appreciated.

    Thanks!

    A surveyor is measuring the length of a lake. He takes angle
    measurements from two positions, A and B, that are 136 m apart
    and on the same side of the lake. From B, the measure of the angle
    between the sight lines to the ends of the lake is 130, and the
    measure of the angle between the sight lines to A and one end of
    the lake is 120. From A, the measure of the angle between the
    sight lines to the ends of the lake is 65, and the measure of the
    angle between the sight lines to B and the same end of the lake is
    20. Calculate the length of the lake, to the nearest metre.
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  2. #2
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    Re: Obtuse Triangles - Help with drawing!

    Quote Originally Posted by mmonkman View Post
    Hi, I received this question today. I need help with the placement of the 120 degree angle and 20 degree angle. The wording is confusing. Any help is appreciated.

    Thanks!

    A surveyor is measuring the length of a lake. He takes angle
    measurements from two positions, A and B, that are 136 m apart
    and on the same side of the lake. From B, the measure of the angle
    between the sight lines to the ends of the lake is 130, and the
    measure of the angle between the sight lines to A and one end of
    the lake is 120. From A, the measure of the angle between the
    sight lines to the ends of the lake is 65, and the measure of the
    angle between the sight lines to B and the same end of the lake is
    20. Calculate the length of the lake, to the nearest metre.
    Obtuse Triangles - Help with drawing!-untitled2.gif
    Thanks from mmonkman
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  3. #3
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    Re: Obtuse Triangles - Help with drawing!

    Thank you! Very helpful.
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