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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. - PowerPoint PPT Presentation
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Chapter 3 3-2 Angles formed by parallel lines
and transversal
SAT Problem of the day O An isosceles triangle has sides
lengths 5,11, and x. How many possible values of x exists?
O A)OneO B)TwoO C)ThreeO D)Four O E) More than four
Solution to the SATO Right Answer: A
Objectives O Prove and use theorems about the
angles formed by parallel lines and a transversal.
Corresponding angles
Example 1: Using the Corresponding Angles
O Find each angle measure.O A) mECF
O B) mDCE
Example#2Find mQRS.
Student guided practice
O Do problems 1 and 2 from your book page 158
Angles O Remember that postulates are
statements that are accepted without proof.
O Since the Corresponding Angles Postulate is given as a postulate, it can be used to prove the next three theorems.
Example#3O Example 3: Finding Angle Measures
O Find each angle measure.O A. mEDGO B. mBDG
Example#4O Find mABD.
Student Guided Practice
O Do problem #4 on your book page 158
Homework!!O DO problems 6 to 11 in your book
page 158
Closure O Today we learned about angles
formed by a transversal.O Next class we are going to learn
proving lines parallel