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Math Help - Geometry - Angle

  1. #1
    Junior Member
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    Smile Geometry - Angle

    Find the angles a and b in the diagram, giving reasons.
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  2. #2
    Senior Member topher0805's Avatar
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    I don't see an angle b.

    For angle a, all you have to know is that all angles along a straight line must add up to 180 degrees. You know two of the angles (90 and 68) so simply subtract those from 180 to find a.
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