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# Geom4-6

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• 1. Geom4­6.notebook November 15, 2011 Please be seated and ready to begin  when the bell rings. Thank you! Agenda for the day: 1. vocabulary quiz 2. review activity 3. finish 4.6 4. questions on homework Visual interpretation of slope: Positive Slope: 6 y 5 4 3 2 1 x ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 ­1 ­2 ­3 ­4 ­5 ­6 1
• 2. Geom4­6.notebook November 15, 2011 Visual interpretation of slope: Negative Slope: 6 y 5 4 3 2 1 x ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 ­1 ­2 ­3 ­4 ­5 ­6 Visual interpretation of slope: Zero Slope: 6 y 5 4 3 2 1 x ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 ­1 ­2 ­3 ­4 ­5 ­6 2
• 3. Geom4­6.notebook November 15, 2011 Visual interpretation of slope: No Slope: 6 y 5 4 3 2 1 x ­6 ­5 ­4 ­3 ­2 ­1 0 1 2 3 4 5 6 ­1 ­2 ­3 ­4 ­5 ­6 3
• 4. Geom4­6.notebook November 15, 2011 A few theorems about slope: • If two nonvertical lines are parallel, then their slopes are equal. • If the slopes of two nonvertical lines are equal, then the lines are  parallel. • If two lines are perpendicular and neither is vertical, each lines  slope is the opposite reciprocal of the others. • If a lines slope is the opposite reciprocal of another lines slope,  the two lines are perpendicular. homework questions?? 4