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13 Use Midpoint and Distance Formulas.notebook 1 August 27, 2014 13 Use Midpoint and Distance Formulas ProofofMichaelJacksonsGhost_Scarynewrawfootage_.avi

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  • 13 Use Midpoint and Distance Formulas.notebook

    1

    August 27, 2014

    13

    Use Midpoint and

    Distance Formulas

    ProofofMichaelJacksonsGhost_Scarynewrawfootage_.avi

  • 13 Use Midpoint and Distance Formulas.notebook

    2

    August 27, 2014

    Midpoint Formula

    A(x1,y1), B(x2,y2)

    m of AB =   x1 + x2 , y1 + y22     2( (

    or

    (Average the x's, Average the y's)

    Midpoint of 2 points

    A M B

    AM = MB  ?  How do you show midpoint on the diagram?

    Segment Bisector  A point, line, line segment, or plane that intersects the segment at its midpoint.

    EX.

    A B

    C

    D

    CD is a segment bisector AB

    If told this, make sure you label your diagram accordingly!

  • 13 Use Midpoint and Distance Formulas.notebook

    3

    August 27, 2014

    Y

    A

    B

    X

    1.)  A(7,4) B(1,2)

    midpoint = ?

  • 13 Use Midpoint and Distance Formulas.notebook

    4

    August 27, 2014

    2.)  E(1,2) F(5,4)

    3.)  Point C is the midpoint of BD.  Find BC ifBC = 3x  2 and CD = 2x + 3.

    B C D

    4.)  The midpoint of XZ is M(5,6).  One endpoint is X(3,7).  Find the coordinates of endpoint Z.

  • 13 Use Midpoint and Distance Formulas.notebook

    5

    August 27, 2014

    Where are midpoints used?

    http://home.howstuffworks.com/homeimprovement/decorating/choosingaquariumequipment14.htm

    http://home.howstuffworks.com/home-improvement/decorating/choosing-aquarium-equipment14.htm

  • 13 Use Midpoint and Distance Formulas.notebook

    6

    August 27, 2014

    Distance Formula

    d = √(x2  x1)2 + (y2  y1)2

    Check out this video!

    X

    BA

    Y

    Find AB

    Example:

    http://videos.howstuffworks.com/businessandmoney/mathematicsvideosplaylist.htm

    http://videos.howstuffworks.com/business-and-money/mathematics-videos-playlist.htm

  • 13 Use Midpoint and Distance Formulas.notebook

    7

    August 27, 2014

    X

    Y

    Find AB

    Do you need to graph the points to find the distance?

    Example

    Interactive distance formula site!

    http://www.mathwarehouse.com/algebra/distance_formula/interactivedistanceformula.php

  • 13 Use Midpoint and Distance Formulas.notebook

    8

    August 27, 2014

    http://www.classzone.com/cz/books/geometry_2011_na/resources/applications/animations/explore_learning/dswmedia/anm503/anm503.html

    Try this activity on your classzone site:

    http://www.classzone.com/cz/books/geometry_2011_na/resources/applications/animations/explore_learning/dswmedia/anm503/anm503.html

  • 13 Use Midpoint and Distance Formulas.notebook

    9

    August 27, 2014

    Homework:

    p. 1922/115 Odd (draw and label #9), 19, 21, 25, 33, 34, 

    4143

  • Attachments

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    SMART Notebook

    Page 1: Aug 13-4:26 AMPage 2: Aug 13-4:50 AMPage 3: Aug 13-5:01 AMPage 4: Aug 13-5:04 AMPage 5: Aug 13-5:14 AMPage 6: Aug 27-9:01 AMPage 7: Aug 27-9:08 AMPage 8: Aug 31-10:32 AMPage 9: Aug 13-5:05 AMAttachments Page 1