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September 18, 2014

September 18, 2014

Posted by **IB student** on Thursday, August 30, 2012 at 8:29pm.

I'm having some trouble on this one... I think it's sometimes...?

- Geometry Honors (p.2) -
**Steve**, Friday, August 31, 2012 at 11:29amsometimes what?

Is there a typo here? The required answer is "always parallel".

actually, the question is ill-worded. What does it mean for a plane to lie in a plane?

I think they mean polygons, or plane figure, or region which lies in a plane.

Associated with a plane is a normal vector, which is perpendicular to it. Parallel planes have normals which have the same or opposite direction. That is, the normals are parallel.

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