Parallel lines are parallel. Proof they have same slopes
No. Consider two adjacent faces on a cuboid. Both planes are parallel to the edge at which the intersect. But the fact that they do intersect illustrates that they are not parallel.
Yes, parallel and perpendicular are opposites.
A square (i am pretty sure) has 2 sets of parallel sides and four parallel sides.
A cone does not have any parallel lines
If they were not actually parallel then they would not be parallel lines!
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If L1 is parallel to L2 and L2 is parallel to L3 then L1 is parallel to L3.
A square has parallel sides. A rectangle has parallel sides.
The opposite sides are parallel to each other
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a disk which is parallel
A structure that is parallel.
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Any circuit that even has more than one branch is a parallel one.
Yes. A rhombus is parallel. Or also called a parallelogram. It's parallel because it is a quadrilateral with 4 parallel sides.