2) If two planes are perpendicular to the same line,
a) they are perpendicular
b) they are parallel.
c) they intersect but are not perpendicular.
d) none of the above.

Question

2)	If two planes are perpendicular to the same line,
a)	they are perpendicular
b)	they are parallel.
c)	they intersect but are not perpendicular.
d)	none of the above.

anonymous · Answer

The planes are parallel. This drawing will help clear this up
|dw:1336082180719:dw|
P1 is the top plane, p2 is the bottom. In order for them to be perpendicular to the plane, both must have a right angle to the line. for this to be true, they both need to be parallel, because if they weren't, the angle with the line wouldn't be 90 degrees