CK-12 Geometry-Concepts

(Marvins-Underground-K-12) #1

3.4. Alternate Interior Angles http://www.ck12.org


7.m^64 = ( 3 x− 7 )◦andm^65 = ( 5 x− 21 )◦
8.m^63 = ( 2 x− 1 )◦andm^66 = ( 4 x− 11 )◦
9.m^63 = ( 5 x− 2 )◦andm^66 = ( 3 x)◦
10.m^64 = (x− 7 )◦andm^65 = ( 5 x− 31 )◦
11.m^63 = ( 8 x− 12 )◦andm^66 = ( 7 x)◦
12.m^64 = ( 4 x− 17 )◦andm^65 = ( 5 x− 29 )◦

For questions 13-15, use the picture below.



  1. What is the alternate interior angle to^6 4?

  2. What is the alternate interior angle to^6 5?

  3. Are the two lines parallel? Explain.

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