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Mathematics 9 Online
OpenStudy (shaleiah):

Geometry

OpenStudy (shaleiah):

I believe that 'B' can be eliminated

OpenStudy (esshotwired):

You are correct. <AOD and <BOC are adjacent on a straight line meaning they will equal 180 degrees, but since AB and CD are perpendicular then you can then figure that those two angles are both 90 degrees. That sounds kinda confusing so I apologize, but you are correct already.

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