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Chapter 3

Chapter 3. 3-2 Angles formed by parallel lines and transversal. SAT Problem of the day. An isosceles triangle has sides lengths 5,11, and x. How many possible values of x exists? A)One B)Two C)Three D)Four E) More than four. Solution to the SAT. Right Answer: A. Objectives.

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Chapter 3

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  1. Chapter 3 3-2 Angles formed by parallel lines and transversal

  2. SAT Problem of the day • An isosceles triangle has sides lengths 5,11, and x. How many possible values of x exists? • A)One • B)Two • C)Three • D)Four • E) More than four

  3. Solution to the SAT • Right Answer: A

  4. Objectives • Prove and use theorems about the angles formed by parallel lines and a transversal.

  5. Corresponding angles

  6. Example 1: Using the Corresponding Angles • Find each angle measure. • A) mECF • B) mDCE

  7. Example#2 Find mQRS.

  8. Student guided practice • Do problems 1 and 2 from your book page 158

  9. Angles • Remember that postulates are statements that are accepted without proof. • Since the Corresponding Angles Postulate is given as a postulate, it can be used to prove the next three theorems.

  10. Example#3 • Example 3: Finding Angle Measures • Find each angle measure. • A. mEDG • B. mBDG

  11. Example#4 • Find mABD.

  12. Student Guided Practice • Do problem #4 on your book page 158

  13. Homework!! • DO problems 6 to 11 in your book page 158

  14. Closure • Today we learned about angles formed by a transversal. • Next class we are going to learn proving lines parallel

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