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OpenStudy (anonymous):
A source of laser light sends rays AB and AC toward two opposite walls of a hall. The light rays strike the walls at points B and C, as shown below. What is the distance between the walls? 80 m 140 m 70 m 110 m
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OpenStudy (anonymous):
OpenStudy (anonymous):
|dw:1342774175043:dw| NOW FIND D2
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