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Thread: 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 $\displaystyle \angle(DAB)$ and the $\displaystyle \angle(DEB)$ subtend the same cord of the circle. Thus they must be equal.

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



    to #c) You can prove that the triangles in question are congruent and therefore the angles in question must be equal.
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