NAME: DATE: PD:
Comprehension Questions
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.