4.1,4.6 - midpoint formula and slope review...

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4.1,4.6 Midpoint Formula and Slope Review EXPORT.notebook January 07, 2016 Mental Floss: Tues. Jan 5 th 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 Rise Run (1,2) (4,7) Stack Method Rise Run (1,2) (4,7) Slope Parallel 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.

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Page 1: 4.1,4.6 - Midpoint Formula and Slope Review EXPORT.notebookmrurbanc.weebly.com/.../4/4/2/6/44267585/4.14.6_-_notes.pdf4.1,4.6 Midpoint Formula and Slope Review EXPORT.notebook January

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.

Page 2: 4.1,4.6 - Midpoint Formula and Slope Review EXPORT.notebookmrurbanc.weebly.com/.../4/4/2/6/44267585/4.14.6_-_notes.pdf4.1,4.6 Midpoint Formula and Slope Review EXPORT.notebook January

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)