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GEOMETRY 3-1 Lines and Angles Vocabulary Examples 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 Vocabulary • Transversal: A line that intersects two coplanar lines at two different points. Transversal Vocabulary • Corresponding angles: Lie on the same side of the transversal and on the same sides of the other two lines. Corresponding Corresponding Corresponding Corresponding Vocabulary • Alternate Interior Angles: Nonadjacent angles that lie on opposite sides of the transversal and between the other two lines. Alternate Interior Alternate Interior Alternate Interior Alternate Interior Vocabulary • Alternate Exterior Angles: Lie on opposite sides of the transversal and outside the other two lines. Alternate Exterior Alternate Exterior Alternate Exterior Alternate Exterior Vocabulary • Same-Side Interior: Lie on the same side of the transversal and between the two lines. Same-side Interior Same-side Interior Same-side Interior Same-side Interior Examples Give an example of each angle pair. A. corresponding angles B. alternate interior angles C. alternate exterior angles D. same-side interior angles More Examples 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
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