# Similarity and Dilations

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```					    Agenda 02.11.11
Warm Up/Reflection
Questions from HW?
Ch 8.8 Similarity and Dilations
Making Faces Project
(Due Monday)
Warm Up
Graph the following points to create
triangle ABC.
A (1, 2) B (4, 1) C (2, 4)

Now, complete the following transformations:
• Reflect across the x-axis
• Translate 8 units left and 6 units down
• Rotate 90º counterclockwise
Similarity and
Dilations
Chapter 8.8
Similar Polygons: have the same shape, but can
be different sizes

Dilation: stretches or shrinks a figure. The
image created is similar to the original
figure

Distortion: scales the figure in one dimension,
leaving the other dimension the
same
Create the face
Place a sheet of graph
paper over the face
parts worksheet, and
trace the desired parts
to make a face

Place letters along the
width and numbers
along the length of the
graph paper to provide
reference coordinates
for each cell of the face.
Enlarge the face

To do this, you
will double the
width and
length of the
cells of the
face.
You will need to copy each cell’s content form the
original into the appropriate cell of the
enlargement.
(What is in cell D3 of original will go in cell D3 of
enlargement, it will just be much larger)
Distort the face
To distort the face, you will scale up one
dimension, and leave the other dimension the
same. Please scale the one dimension by 3 or 4.
To Recap:
(one box for each dimension)

(two boxes for each dimension)

(one box for each on one dimension, three boxes for
each on the other dimension)

When you are done, color in the faces.
Note: each face should be on a separate
piece of graph paper.

```
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 views: 11 posted: 3/26/2012 language: English pages: 13