Lines are ________ if they lie in the same plane.
Question: Lines are ________ if they lie in the same plane.
Lines are coplanar if they lie in the same plane. This means that all of the points on the lines can be reached by moving in two dimensions.
Here are some examples of coplanar lines:
- Two sides of a triangle
- The diagonals of a quadrilateral
- The lines on a piece of paper
Here are some examples of lines that are not coplanar:
- The sides of a cube
- The lines on two different walls
- The lines on a sheet of paper and a book
Coplanar lines can be parallel, intersecting, or skew. Two parallel lines never intersect, while two intersecting lines meet at one point. Skew lines do not intersect or lie in the same plane.
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