Mathematics

NAME: DATE: PD:
Comprehension Questions
1. What was the scale factor of your 1st enlargement? What about your second enlargement?
2. What is the scale factor of your reduction?
3. Describe how you created your horizontal stretch?
4. Describe how you created your vertical stretch?
ORIGINAL
FIGURE
ENLARGEMENT
1
ENLARGEMENT
2
REDUCTION HORIZONTAL
STRETCH
VERTICAL
STRETCH
Dilation– is a transformation that produces an image that is the same shape
as the original, but is a different size. A dilation STRETCHES or SHRINKS
the original figure.
Scale Factor– is the ratio that determines how much the figure stretches
(MULTIPLY) or shrinks (DIVIDES).
ENLARGEMENT ex. 1 ENLARGEMENT ex. 2
MULTIPLY each coordinate by 3
P (1, 3), Q (3, 1), R (1, 1) – ORIGINAL
P’ (3, 9), Q’ (9, 3), R’ (3, 3) – IMAGE
REDUCTION ex. 1 REDUCTION ex. 2
Divide each coordinate by 2 Divide each coordinate by 2
A (-2, 4), B (4, 4), C (2, -2), D (-4, -2) – ORIGINAL A (4, 2), B (-2, 6), C (-6, -4) – ORIGINAL
A’ (-1, 2), B’ (2, 2), C’ (1, -1), D’ (-2, -1) – IMAGE A’ (2, 1), B’ (-1, 3), C’ (-3, -2) – IMAGE
Horizontal Stretch – To create a HORIZONTAL STRETCH, multiply the
x-coordinate by a scale factor.
Vertical Stretch – To create a VERTICAL STRETCH, multiply the
y-coordinate by a scale factor.

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