Are two perpendicular lines always, sometimes or never co-planar?
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"How to prove this ?
#2|k^2# then #2|k# for some #k\inZZ#"
1 Answer
Nov 14, 2015
Always.
Explanation:
Perpendicular lines are defined as being co-planar, so therefore they always have to be co-planar or else they would be skew.
