3.5 Notes B
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3.5 Slopes of Lines 1 October 21, 2009 Opener: Put your name AND ID number on each raffle ticket. Answer each of the following on a separate raffle ticket. Raise your hand SILENTLY when you are done so I can check your work. 1.) State two main requirements to be a perpendicular bisector. 2.) If two coplanar lines are perpendicular to the same line, then the two lines are ____________ to each other.
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Transcript of 3.5 Notes B
3.5 Slopes of Lines
1
October 21, 2009
Opener:Put your name AND ID number on each raffle ticket. Answer each of the following on a separate raffle ticket. Raise your hand SILENTLY when you are done so I can check your work.
1.) State two main requirements to be a perpendicular bisector.
2.) If two coplanar lines are perpendicular to the same line, then the two lines are ____________ to each other.
3.5 Slopes of Lines
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October 21, 2009
Homework Questions:
3.5 Slopes of Lines
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October 21, 2009
3.5 Slopes of Lines
3.5 Slopes of Lines
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October 21, 2009
Slope of a Line:
Quick Check: Find the value of m.
1.) m= 2.)m=
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October 21, 2009
Use the slope formula to determine the slope of each line.
3.) EF 4.)GH
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October 21, 2009
Slope of a Line
Positive Slope Negative Slope
Zero Slope
Undefined Slope
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October 21, 2009
Slopes of Parallel and Perpendicular Lines:
• In a coordinate plane, two nonvertical lines are parallel if and only if they have the _________ slope. Any two vertical lines are ___________.
• In a coordinate plane, two nonvertical lines are perpendicular if and only if the product of their slopes is ______. Vertical and horizontal lines are ___________.
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October 21, 2009
Determining whether lines are Parallel, Perpendicular or Neither...
Graph each pair of lines. Use their slopes to determine whether they are parallel, perpendicular, or neither.
5.) UV and XY for U (0,2), V (-1,-1), X (3,1), and Y (-3,3)
6.) CD and EF for C (-1,-3), D(1,1), E (-1, 1), and F (0,3).
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October 21, 2009
Homework:
*Pg. 186 # 11-23 odd, 26-33 all (As is on Assignment Sheet)
*Writing Assignment # 2 (Due Monday, 10/26)
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October 21, 2009
*NaMmMe ThAaAtT sLoOoPpE*
3.5 Slopes of Lines
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October 21, 2009
Math Raffle:
Put your name AND ID number on each raffle ticket. Answer each of the following on a separate raffle ticket. Raise your hand SILENTLY when you are done so I can check your work.
1.) What is true about the slope of two perpendicular lines?
2.) What is true about the slope of two parallel lines?
