3.1 Lines & Angles

3.1 Lines & Angles - then there is exactly one line...

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Definitions Definitions Parallel lines (ll) – lines that are coplanar & do not intersect l ll m Skew lines – lines that are not coplanar & do not intersect. Parallel planes – 2 planes that do not intersect. Example:   l            m
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H G D C A B E F 1. 2. . 3. . 4. . 1. Parallel 2. Parallel 3. Skew 4. Parallel
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Postulate 13 : ll postulate If there is a line & a point not on the line, then there is exactly one line through the point ll to the given line.
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Postulate 14 : Post. If there is a line & a point not on the line,
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Unformatted text preview: then there is exactly one line through the point that is to the given line. Transversal A line that intersects 2 or more coplanar lines at different points. l m t 1 2 3 4 5 6 7 8 Interior <s- <3, <4, <5, <6 (inside l & m ) Exterior <s- <1, <2, <7, <8 (outside l & m ) Alternate Interior <s- <3 & <6, <4 & <5 (alternate opposite sides of the transversal) Alternate Exterior <s- <1 & <8, <2 & <7 Consecutive Interior <s- <3 & <5, <4 & <6 (consecutive same side of transversal) Corresponding <s- <1 & <5, <2 & <6, <3 & <7, <4 & <8 (same location) Assignment Assignment...
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3.1 Lines & Angles - then there is exactly one line...

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