4.7 Congruence Transformations.notebook

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Find the distance between (9, ­2) and (­5, 4)

"Do Now"

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Homework Answers

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Quizzie Poo

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Watch Ms. Pac Man go!

http://robertkaplinsky.com/work/ms­pac­man/#prettyPhoto

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Unit 5: Congruent Triangles4.7 Congruence Transformations

Date

Transformation 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

4.7 Congruence Transformations.notebook

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CongruenceTransformation

(aka: Rigid Motionor Isometry)

Pre­image and image are in different positions, but still congruent

3 Types: 1. Translation2. Reflection3. Rotation

4.7 Congruence Transformations.notebook

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1. Translation Slide of same distance in same direction

2. Rotation 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

3. Reflection 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

4.7 Congruence Transformations.notebook

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Which type of congruence transformation?

4.7 Congruence Transformations.notebook

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October 31, 2013

Which type of congruence transformation?

4.7 Congruence Transformations.notebook

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October 31, 2013

Which type of congruence transformation?