Module 1.5 - Dilations

Triangle ABC is dilated to produce triangle A'B'C' with scale factor 3/4 . Which describes the relationship between the two triangles?

• Triangle A'B'C' is an enlargement of triangle ABC

• Triangle A'B'C' is a reduction of triangle ABC

• Triangle A'B'C' is a mirror image of triangle ABC

Congruent figures are figures that are the SAME size and the SAME shape.A dilation produces a congruent figure. (a)  

• True
• False

Which is true about the scale factor when a figure is enlarged? (a)  

• The scale factor is zero.
• The scale factor is 1.
• The scale factor is larger than 1.
• The scale factor is smaller than 1.

Which of the following is the algebraic representation for a dilation? (a)  

• (x, y) → (x, 3y)
• (x, y) → (3x, 3y)
• (x, y) → (x, y - 3)
• (x, y) → (.5x, .4y)

(a)  

• F
• G
• H
• J

(a)  

• A
• B
• C
• D

• A

• B

• C

• D

• F

• G

• H

• J

(a)  

• A
• B
• C
• D

In this figure, triangle TRS is the ​ (a)   , triangle T'R'S' is the ​ (b)   and a(n) ​ (c)   occurred.

• pre-image
• image
• enlargement
• reduction
• spin
• flip