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Angles Formed by Parallel Lines and Transversals

Angles Formed by Parallel Lines and Transversals. Module 3-1 Notes Angles Formed by Parallel Lines & Transversals Monday August 26 th. Holt McDougal Geometry. Holt Geometry. Warm Up. If 2 angles are complementary, then they add up to 90 0

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Angles Formed by Parallel Lines and Transversals

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  1. Angles Formed by Parallel Lines and Transversals Module 3-1 Notes Angles Formed by Parallel Lines & Transversals Monday August 26th Holt McDougal Geometry Holt Geometry

  2. Warm Up If 2 angles are complementary, then they add up to 900 If 2 angles don’t add up to 900, then they aren’t complementary If 2 angles aren’t complementary, then they don’t add up to 900

  3. Vocabulary Transversal – A line that intersects 2 coplanar lines at 2 different points Parallel Lines – lines in the same plane that do NOT intersect

  4. 1 2 4 3 5 6 7 8 5 1 2 6 7 3 8 4

  5. Example 1: Using the Corresponding Angles Postulate Find each angle measure. A. mECF B. mDCE

  6. Try this on your own… Find mQRS.

  7. Alternate Interior Angles Alternate Exterior Angles Same-Side Interior Angles 5 1 2 6 7 3 8 4

  8. Example 2: Finding Angle Measures Find each angle measure. A. mEDG B. mBDG

  9. Try this on your own… Find mABD. Alt. Interior Angles

  10. Classwork m JKL = 1270 m BEF = 630 m 1 = 900 m CBY = 660

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