2.1 and 2.2 Topics: Remember

2.1 and 2.2 Topics: Remember

2.1—————————

• Parallel Lines- Never Touch

• Skew: would touch if they were on the same plane but don’t because they are not

• Corresponding: same spot of intersection

  
  

• Alternate Interior: on the INSIDE of the Z / interior of 2 lines

  
  

• Alternate Exterior: on the OUTSIDE of the Z / outside of 2 lines

  
  

• Consecutive Interior: on the same side of the transversal and make a C - also add up to 180

  
  

  
  

  
  

2.2—————————

• How to know if a line is parallel:

• if alternate interior angles are congruent, then lines are parallel

• if alternate exterior angles are congruent, then lines are parallel

• if corresponding angles are congruent, then lines are parallel

• if consecutive angles are supplementary, then lines are parallel

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• if its a vertical angle then its parallel because angles are equal

• if its a given a II b then you need one angle on each line for it to be parallel

• triangle= 180 degrees

• supplementary is =180