Two lines in two intersecting planes can be parallel, intersecting, or skew.
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Two lines that are not parallel and do not intersect are skew. If the non-intersecting lines are in the same plane then they are parallel.
False. The angles can be formed by two skew lines intersecting a third line.
One.
If they are straight lines, then they define a plane in which both lines lie.
perpendicular lines are lines that MEET at right angles (90 degrees). Skew lines are lines that dont meet at all. Even though the gradients of two skew lines can multiply to be -1 (a property of perpendicular lines) They will not really be perpendicular as they don't accually meet. This can occur when the lines are in different planes.