TODAY IN GEOMETRY…  STATs for Ch.3.1-3.3 Quiz  Learning Goal 2: 3.4 Calculate Parallel and Perpendicular Slopes with a graph and algebraically  Independent.

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TODAY IN GEOMETRY…  STATs for Ch Quiz  Learning Goal 2: 3.4 Calculate Parallel and Perpendicular Slopes with a graph and algebraically  Independent Practice

HOW DID YOU “SHAPE” UP?? Results for ALL of my Geometry classes: GRADE NUMBER OF STUDENTS WHO TOOK THE CH.3 QUIZ (17 pts.) 1 ST PERIOD3 RD PERIOD5 TH PERIOD6 TH PERIODTOTAL A B C D F Avg

KINDS OF SLOPES

UNDEFINED ZERO POSITIVE INCREASING NEGATIVE DECREASING

Used in Graphing

REVIEW: CALCULATING SLOPE WITH A GRAPH

Find the slope of AB A B Find two points that are on crosshairs. (exact points)

PRACTICE: Find the slope of the given line.

REVIEW: CALCULATING SLOPE GIVEN TWO POINTS

Find the slope of AB: A(-2, 8) B(3, 2) PREDICT: Do you expect to have an increasing or decreasing slope? NEGATIVE = DECREASING SLOPE

Find the slope of CD: C(5,-2) D(-4,1) PREDICT: Do you expect to have an increasing or decreasing slope? NEGATIVE = DECREASING SLOPE

REVIEW: SLOPE STEEPNESS

Which line is steeper? Greater the absolute value of the slope = steeper

SLOPES OF PARALLEL AND PERPENDICULAR LINES

Which of the following lines are parallel or perpendicular? A B C D E F

Give the PARALLEL and PERPENDICULAR slopes for the following lines.

Line m passes through ( -1, 3) and (4, 1). Line t passes through (-2, -1) and (3, -3). Are the two lines parallel, perpendicular or neither.

*To calculate the perpendicular slope, you must determine the slope first.

HOMEWORK #4: Pg. 175: 1-27 odd If finished, work on other assignments: HW #1: Pg. 150: 11-15, 18-23, 24-32, HW #2: Pg. 157: 4-19, 22-24, 27-31, 33, 35, 36 HW #3: Pg. 165: 3-15, 19-21, 23, 26, 27