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4.1,4.6 Midpoint Formula and Slope Review EXPORT.notebook January 07, 2016
Mental Floss: Tues. Jan 5th
a.) Plot the following points on a coordinate grid.
b.) Find the slopes of all 3 sides of triangle ABC.
c.) Is triangle ABC a right triangle? Justify your answer.
Mental Floss
4.6 Slope
• http://www.interactmath.com
• Click Enter
• Select 2nd book: Alg 1 Common Core 2015
• Click Submit
• Chapter 5, Section 1 (Slope)
• Practice!!
SlopeIntercept Form
• Slope• Rate of change (per)• Coefficient
• yintercept• Initial "value"• Constant
Methods of Finding Slope
• Slope Formula
Ex: (1,2) and (4,7)
• Graphical Method
RiseRun (1,2)
(4,7)
• Stack MethodRiseRun
(1,2)(4,7)
SlopeParallel Lines = Same slope
Perpendicular Lines = Slopes are opposite reciprocals
Slope Slope of Parallel Line
Slope of Perpendicular Line
5
1.6
1.) Fill in the missing slopes in the table below.
4.1,4.6 Midpoint Formula and Slope Review EXPORT.notebook January 07, 2016Mental Floss Wed Jan 6th1.) Find the slope of the line passing through the points (1,3) and (2,6).
2.) Write an equation in slopeintercept form of the line that passes through the points from #1.
3.) Write the equation from #2 in standard form.
4.) Write an equation in slopeintercept form of any line that is perpendicular to the equation from #2
Midpoint FormulaThe midpoint of a segment can be found using the formula:
Average of xvalues Average of yvalues
Example: Find the midpoint of a segment with endpoints at (1,3) and (2,6).
Midpoint Formula2.) Find the coordinate of the midpoint, M, of segment ST.
S TM
3.) Find the slope of the median of triangle ABC to side AC.
A(3,8)
B(1,1)
C(10,5)
Homework• 4.6 P.202 #24,6,8,13 (Due Wed 1/6)
• 4.1 P.173 #46 and p.202 #5 (Due Thurs 1/7)