# Using Properties of Parallel Lines/

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The flashcards below were created by user LaurenCamp29 on FreezingBlue Flashcards.

1. When do we need to put converse at the end?
When they're asking why the lines are parallel
2. The two theorems that have no names
If two lines are parallel to the same line, then they are parallel to each other

If two lines are perpendicular to the same line then they are perpendicular to each other
3. When all right anles are congruent to each other
Right Angle Theorem
4. They always have the same slope
Parallel Lines
5. Has a slope of zero
Horizontal Lines
6. Have an Undefined Slope
Vertical Lines
7. Lines goes up to the left
Negative Slope
8. Line goes up to the right
Positive Slope
9. measures how steep the line is
Slope
10. Formula for Slope?
y2-y1

x2-x1
11. When is it an undefined slope?
When the zero is the numerator
12. In a coordinate plane, 2 non-vertical lines are perpendicular if and only if the product of their slopes is -1.
(when the slopes are opposite reciprocals)
Slopes of Perpendicular Postulate
13. What lines are perpendicular?
Horizontal and Vertical Lines

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 Author: LaurenCamp29 ID: 179950 Filename: Using Properties of Parallel Lines/ Updated: 2012-10-25 23:00:00 Tags: using properties parallel lines soph math geometry Folders: Description: fkjsafkj Show Answers:

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