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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