Objectives Identify parallel, perpendicular, and skew lines.

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Presentation transcript:

Objectives Identify parallel, perpendicular, and skew lines. Identify the angles formed by two lines and a transversal.

Vocabulary parallel lines perpendicular lines skew lines parallel planes transversal corresponding angles alternate interior angles alternate exterior angles same-side interior angles

Name… A pair of skew lines. A pair of parallel lines. A pair of perpendicular lines. A pair of parallel planes.

Segments or rays are parallel, perpendicular, or skew if the lines that contain them are parallel, perpendicular, or skew. Helpful Hint

Example 2: Classifying Pairs of Angles Give an example of each angle pair. A. corresponding angles 1 and 5 B. alternate interior angles 3 and 5 C. alternate exterior angles 1 and 7 D. same-side interior angles 3 and 6

Check It Out! Example 2 Give an example of each angle pair. A. corresponding angles 1 and 3 B. alternate interior angles 2 and 7 C. alternate exterior angles 1 and 8 D. same-side interior angles 2 and 3

To determine which line is the transversal for a given angle pair, locate the line that connects the vertices. Helpful Hint

Example 3: Identifying Angle Pairs and Transversals Identify the transversal and classify each angle pair. A. 1 and 3 transversal l corr. s B. 2 and 6 transversal n alt. int s C. 4 and 6 transversal m alt. ext s

Assignment p. 148: 1-13, 26-29, 44-48