Homework Help: math

Posted by kitty on Wednesday, February 6, 2013 at 12:51am.

light from point a makes an angle of 20 degrees to the horizontal plane. it is then reflected by plane mirror m. whta is the reflected light s perpendicular to the horizontal plane.

math - Steve, Wednesday, February 6, 2013 at 12:43pm
The English is garbled, but I think the answer is

70 degrees (90-20)

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