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In a plane, if a line is perpendicular to one of two blank lines, then it is also perpendicular to the other
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In a plane, if a line is perpendicular to one of two blank lines, then it is also perpendicular to the other

User Niklas Heidloff
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check the picture below.

if the black lines are parallel, and the red one is perpendicular to one of them, well, you know the rest.
In a plane, if a line is perpendicular to one of two blank lines, then it is also-example-1
User Igor Krupitsky
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