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Math Help - Geometry Question

  1. #1
    fox
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    Post Geometry Question

    Please find the attached figure.

    What I have is:
    - The length of [AB]
    - The length of [AD]
    - ABCD is a rectangle
    - AFD is a right triangle
    - Lines x and y are parallel
    - Lines x and z are perpendicular

    What I need to find is:
    - The value of the angle ADE (a general formula for it)

    Help please!
    Attached Thumbnails Attached Thumbnails Geometry Question-math.png  
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by fox View Post
    Please find the attached figure.

    What I have is:
    - The length of [AB]
    - The length of [AD]
    - ABCD is a rectangle
    - AFD is a right triangle
    - Lines x and y are parallel
    - Lines x and z are perpendicular

    What I need to find is:
    - The value of the angle ADE (a general formula for it)

    Help please!
    Angle(ADF) = arccos((y-x)/AD) degrees

    Angle(ADE) = 90- Angle(ADF) degrees

    RonL
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  3. #3
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by fox View Post
    Please find the attached figure.

    What I have is:
    - The length of [AB]
    - The length of [AD]
    - ABCD is a rectangle
    - AFD is a right triangle
    - Lines x and y are parallel
    - Lines x and z are perpendicular

    What I need to find is:
    - The value of the angle ADE (a general formula for it)

    Help please!
    You don't have enough information to get a general solution in terms of the variables you listed. Your angle could be anything between 0 and 90 degrees.

    -Dan
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  4. #4
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by topsquark View Post
    You don't have enough information to get a general solution in terms of the variables you listed. Your angle could be anything between 0 and 90 degrees.

    -Dan
    I agree with topsquark. We need more info. If you had the lengths of AE or AF as well, the problem could be solved. But maybe then it would be too easy and wouldn't be a problem.
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  5. #5
    fox
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    Post New Problem

    I see. Let's forget about the previous problem and think about this one then instead.

    What I have is:
    - The length of [AB]
    - The length of [AD]
    - The length of [CG]
    - The length between lines x and w
    - ABCD is a rectangle
    - DCGF is a rectangle
    - AFD is a right triangle
    - Lines x, y and w are parallel
    - Lines x and z are perpendicular

    What I need to find is:
    - The value of the angle ADE (a general formula for it)

    Can I get the value of angle ADE in this problem?
    Attached Thumbnails Attached Thumbnails Geometry Question-math1.png  
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  6. #6
    Forum Admin topsquark's Avatar
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    Someone check me on this, but I don't believe so.

    Where are you getting these problems from?

    -Dan
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