# Geometry Parallel and Perpindicular Lines

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The flashcards below were created by user MoonRacer on FreezingBlue Flashcards.

1. What are parallel lines?
Lines that are on the same plane and never intersect.
2. What are skew lines?
Skew lines are lines that are on different planes and never intersect.
3. What are two planes that never intersect called?
Parallel planes
4. What is a transversal?
A line that intersects two or more coplanar lines at different points.
5. What are corrseponding angles?
ANgles that have corresponding positions. The angles are congruent if the lines are parallel and cut by a transversal.
6. What are alternate interior angles?
Angles that are on opposite sides of the transversal and are between the two lines. They are congruent if the lines are parallel.
7. What are alternate exterior angles?
Angles that are on opposite sides of the transversal and are outside of the two lines. They are congruent if the lines are parallel.
8. What are consecutive interior angles?
Angles that are on the same side of the transversal and between the two lines. They are are supplementary if the lines are parallel.
9. How can you prove that lines are parallel?
• When a tranversal is cut, use one of the following theories to prove that they are parallel:
• Converse of corresponding angles
• Converse of consecutive interior angles
• Converse of alternate exterior angles
• Converse of alternate interior angles
10. How do you find the slope in a line?
• Rise/Run
• Change in y/change in x
• (y-y)/(x-x)
11. What is a negative slope?
A slope that goes down hill.
12. What is a positive slope?
A slope that goes up hill.
13. What is a slope of zero?
A flat line, where the equation is y=b, where b is a constant
14. What is an undefined slope?
A vertical line, where the equation is x=b, where b is a constant
15. What is slope-intercept form?
y=mx+b where m is the slope and b is the y-intercept
16. What is standard form?
Ax+By=C where A and B do not equal zero.
17. What is point-slope form?
y-y1=m(x-x1)

### Card Set Information

 Author: MoonRacer ID: 156709 Filename: Geometry Parallel and Perpindicular Lines Updated: 2012-06-01 00:41:10 Tags: Geometry Math Parallel Perpindicular Lines Folders: Description: Review of parallel and perpindicular lines for Geometry Regents exam. Have some paper to take notes on and draw. Show Answers:

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