Point and Line: Intersection of Perpendicular Planes | UEL Mathematics
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5(UEL) Line r is the intersection of perpendicular planes α and β. Points A and B are such that A lies in plane α but not in plane β, and B lies in plane β but not in plane α. Based on this information, lines AB and r:
a) are inverse
b) are coincident
c) may be concurrent
d) may be parallel to each other
e) may be perpendicular to each other
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