Unit 3 Definitions. Parallel Lines Coplanar lines that do not intersect are called parallel. Segments and rays contained within parallel lines are also.

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Presentation transcript:

Unit 3 Definitions

Parallel Lines Coplanar lines that do not intersect are called parallel. Segments and rays contained within parallel lines are also parallel. The symbol we use for parallel lines is // Planes can also be parallel

Skew Lines Lines that do not intersect and are not coplanar are called skew lines. Segments and rays contained within skew lines are also skew.

Transversal A line that intersects two or more lines in a plane is called a transversal. When a transversal crosses two // line it creates special angles! In general we have two types of angles  Exterior Angles  Interior Angles

// Line Angles Corresponding Angles Alternate Interior Angles Alternate Exterior Angles Consecutive Interior Angles (Same Side)

Perpendicular Transversal In a plane, if line a is perpendicular to one of two parallel lines, then it is perpendicular to other.

Homework Page 136 #14-38