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Lines and Angles: Geometry Warm-Up Lesson Presentation

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jael-mccarty
16 diapositives · 248 Views · Nov 18, 2014

Identify points in the same plane, angles adding up to 180°, intersections of intersecting lines, and adjacent angles. Learn about parallel, perpendicular, and skew lines, angles formed by lines and a transversal.

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  1. 3-1 Lines and Angles Holt Geometry Warm Up Lesson Presentation Lesson Quiz Holt McDougal Geometry

  2. Warm Up Identify each of the following. 1.points that lie in the same plane 2. two angles whose sum is 180° 3. the intersection of two distinct intersecting lines 4. a pair of adjacent angles whose non-common sides are opposite rays coplanar points supplementary angles point linear pair

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

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

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

  6. LM ||QR KNand PQ NS SP Example 1: Identifying Types of Lines and Planes Identify each of the following. A. a pair of parallel segments B. a pair of skew segments C. a pair of perpendicular segments D. a pair of parallel planes plane NMR|| plane KLQ

  7. BF || EJ BFand DE are skew. BF FJ Check It Out! Example 1 Identify each of the following. a. a pair of parallel segments b. a pair of skew segments c. a pair of perpendicular segments d. a pair of parallel planes plane FJH || plane BCD

  8. 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

  9. 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

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

  11. 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

  12. Check It Out! Example 3 Identify the transversal and classify the angle pair 2 and 5 in the diagram. transversal n same-side int. s.

  13. EH || FG BFand EH CG GH Lesson Quiz: Part I Identify each of the following. 1. a pair of parallel segments 2. a pair of skew segments 3. a pair of perpendicular segments 4. a pair of parallel planes ABCand EFG

  14. Lesson Quiz: Part II Identify each of the following. 5. one pairalternate interior angles EHG and HGK 6. One pair corresponding angles EHG and FGJ 7. one pairalternate exterior angles IHE and JGK 8. one pairsame-side interior angles EHG and HGF