4.7 Congruence Transformations.notebook
October 31, 2013
"Do Now"
Find the distance between (9, ­2) and (­5, 4)
1
4.7 Congruence Transformations.notebook
October 31, 2013
Homework Answers
2
4.7 Congruence Transformations.notebook
October 31, 2013
3
4.7 Congruence Transformations.notebook
October 31, 2013
4
4.7 Congruence Transformations.notebook
October 31, 2013
Quizzie Poo
5
4.7 Congruence Transformations.notebook
October 31, 2013
Watch Ms. Pac Man go!
http://robertkaplinsky.com/work/ms­pac­man/#prettyPhoto
6
4.7 Congruence Transformations.notebook
October 31, 2013
Unit 5: Congruent Triangles
4.7 Congruence Transformations
Transformation
Date
An operation that maps a figure (the pre­image)
onto a new figure (the image)
Pre­Image
Image
It can change the position, size, and shape of a
figure
Transformation Statement is very specific
7
4.7 Congruence Transformations.notebook
Congruence
Transformation
(aka: Rigid Motion
or Isometry)
3 Types:
October 31, 2013
Pre­image and image are in different positions,
but still congruent
1. Translation
2. Reflection
3. Rotation
8
4.7 Congruence Transformations.notebook
1. Translation
2. Rotation
3. Reflection
October 31, 2013
Slide of same distance in same direction
Turn around a fixed point (called "center of
rotation"); each point of image and its
matching point in the image are the same
distance from the center of rotation
Flip across a line of reflection; each point
of image and its matching point in the
image are the same distance from the line
of reflection
9
4.7 Congruence Transformations.notebook
October 31, 2013
Which type of congruence transformation?
10
4.7 Congruence Transformations.notebook
October 31, 2013
Which type of congruence transformation?
11
4.7 Congruence Transformations.notebook
October 31, 2013
Which type of congruence transformation?
12