3-1 Parallel Lines and Planes

3-1 Parallel Lines and Planes - ∠ and 6 4 ∠ ∠ and...

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Parallel Lines and Transversals Section 3-1
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2 lines that do not intersect are either parallel or skew . Parallel lines ( lines) do not intersect and are coplanar. Skew lines do not intersect and are not coplanar.
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Parallel planes ( planes) do not intersect. Plane X is parallel to plane Y A line and a plane are parallel if they do not intersect. X Y H G D E A B C F EF plane Y
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A transversal is a line that intersects 2 or more coplanar lines in different points. 1 2 3 4 5 6 7 8 transversal interior exterior exterior
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Alternate interior angles are 2 nonadjacent interior angles on opposite sides of the transversal. 1 2 3 4 5 6 7 8 6 3 and 5 4 and
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Consecutive interior angles are 2 interior angles on the same side of the transversal. 1 2 3 4 5
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Unformatted text preview: ∠ and 6 4 ∠ ∠ and Alternate exterior angles are 2 nonadjacent exterior angles on opposite sides of the transversal. 1 2 3 4 5 6 7 8 8 1 ∠ ∠ and 7 2 ∠ ∠ and Consecutive exterior angles are 2 exterior angles on the same side of the transversal. 1 2 3 4 5 6 7 8 7 1 ∠ ∠ and 8 2 ∠ ∠ and Corresponding angles are 2 angles in corresponding positions relative to the 2 lines. 1 2 3 4 5 6 7 8 7 3 ∠ ∠ and 8 4 ∠ ∠ and 6 2 ∠ ∠ and 5 1 ∠ ∠ and Joke Time What did E.T.’s Mom say when he got home? Where on Earth have you been? What happened when the pig pen broke? The pigs had to use a pencil....
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