Asked by Skye

A pair of intersecting planes ______ intersect in exactly one point?

A- always
B- sometimes
C- never
D- not enough information

I think A- always, but I do not know for sure.
Answered by MathMate
When two planes intersect (such as the edge of a rectangular box), the intersection is a line (not a point).

When two planes do not intersect(such a the top and bottom faces of a rectangular box), then they don't intersect at exactly one point.

Answered by Skye
Ohh, ok. Is the answer never?
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