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Math Help - Geometry - Determine the angles

  1. #1
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    Geometry - Determine the angles

    Ok. I've got a huge problem with this problem. Please use much text when you explain how to solve It so I understand.







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  2. #2
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    Here is a strong hint: m\left( {\angle ADB} \right) = 90^ \circ  .
    Because it is an angle inscribed in a semicircle.
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  3. #3
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    Quote Originally Posted by Plato View Post
    Here is a strong hint: m\left( {\angle ADB} \right) = 90^ \circ .
    Because it is an angle inscribed in a semicircle.

    ok. thanks. I understand that perfectly. But then what?
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  4. #4
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    What do you know about inscribed angles? After all that is the essence of this exercise.
    \angle ABD is the third angle of a right triangle and it is also an inscribed angle.
    From its measure you can get the measure of \text{arc}(AD).
    From that you can get the measure of \text{arc}(DAB).
    Which gives you the measure of x.
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