Boyd/Usilton. Parallel and Skew Lines Parallel lines: coplanar lines that do not intersect. Skew lines: are noncoplanar, not parallel and do not intersect.

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Presentation transcript:

Boyd/Usilton

Parallel and Skew Lines Parallel lines: coplanar lines that do not intersect. Skew lines: are noncoplanar, not parallel and do not intersect. Parallel planes: planes that do not intersect. B C A F D E

Angle Pairs Formed by Transversals Alternate interior: nonadjacent interior angles that lie on opposite sides of the transversal. Same-side interior: interior angles that lie on the same side of the transversal.

Angle Pairs Formed by Transversals Corresponding: lie on the same side of the transversal and in corresponding positions. Alternate-interior: nonadjacent exterior angles that lie on opposite sides of the transversal.

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