 I can prove and use theorems about the angles formed by parallel lines and a transversal.

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Presentation transcript:

 I can prove and use theorems about the angles formed by parallel lines and a transversal.

angle 1 ≅ angle 3 angle 2 ≅ angle 4 Angle 5 ≅ angle 7 angle 6 ≅ angle 8

Let’s Do It!

Label all the angle measures.

Let’s Do It AGAIN! Find all the angle measures.

Complete the two-column proof of the Alternate Exterior Angels Theorem. Given: l ll m Prove: angle 1 ≅ angle 2 StatementsReasons 1. l ll m Given 2. ____________Vertical angle Theorem 3. Angle 3 ≅ angle 2 ______________ 4. ___________________________ l m

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