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Math Help - Geometry - Urgent!

  1. #1
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    Geometry - Urgent!

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  2. #2
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    A happy and successful New Year!

    I've modified your drawing a little bit:

    1. The points A, E, D, B are located on the circumference of a circle around M.

    2. The angles \angle(DAB) and the \angle(DEB) subtend the same cord of the circle. Thus they must be equal.

    3. \angle(x) is the center angle of the the angles of #2. Therefore x = 2\cdot 67^\circ = 134^\circ



    to #c) You can prove that the triangles in question are congruent and therefore the angles in question must be equal.
    Attached Thumbnails Attached Thumbnails Geometry - Urgent!-winkel_imquader.png  
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