Page 100 - Math Course 2 (Book 2)

Transformations: Dilations

Identify Scale Factor Identify Scale Factor

For the green preimage, determine the scale factor Ruben is making a scale drawing of the front of
used for each dilation with center C. Determine his house. His house is 48 feet wide and 30 feet
whether the dilation is an enlargement, reduction,
or congruence transformation. high at its highest point. Ruben decides on a
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dilation reduction factor of What size poster
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A. 2; enlargement board will he need to make a complete drawing?
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B. ; reduction A. 19 in. by 26 in.
2
1
C. ; reduction B. 22 in. by 30 in.
3 C. 20.5 in. by 28 in.
D. 3; enlargement D. 16 in. by 29 in.

Answer Answer

Skill Practice!

Draw the dilation image of each figure with center C and the given scale factor.

1
1. r = 2 2. r =
4

Find the measure of the dilation image M'N' or of the preimage MN using the given scale factor.
3. MN = 3, r = 3 4. M'N' = 7, r = 21

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