Using Properties of Parallel Lines/
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When do we need to put converse at the end?
When they're asking why the lines are parallel
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
When all right anles are congruent to each other
Right Angle Theorem
They always have the same slope
Has a slope of zero
Have an Undefined Slope
Lines goes up to the left
Line goes up to the right
measures how steep the line is
Formula for Slope?
When is it an undefined slope?
When the zero is the numerator
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
What lines are perpendicular?
Horizontal and Vertical Lines
What would you like to do?
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