Dilations STAAR Review

Triangle ABC was dilated with the origin as the center of dilation to create triangle A’B’C’. Which rule best represents the dilation that was applied to triangle ABC to create triangle A'B'C'?

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Rectangle M'N'P' is a dilation of rectangle MNPR, with the origin as the center of dilation.  Which of the following is the scale factor used to dilate the rectangle?

• A

• B

• C

• D

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

• The scale factor is zero.

• The scale factor is 1.

• The scale factor is larger than 1.

• The scale factor is smaller than 1.

Q29

• A

• B

• C

• D

• F

• G

• H

• J

Pentagon M'N'P'Q'R' IS ​ (a)   than pentagon MNPQR, because the scale factor is ​ (b)   .

• smaller

• less than 1

• larger

• greater than 1

Triangle JKL is dilated with the origin as the center of dilation to create triangle J'K'L'. Which rule best represents the dilation that has been applied to triangle JKL to create triangle J'K'L'?

• (x, y) → (x + 6, y - 3)

• (x, y) → (x + 4.5, y + 3)

• (x, y) → (½x, ½y)

• (x, y) → (7/4x, 7/4y)

• A

• B

• C

• D

a transformation that ​changes the size (enlargement or reduction) of a figure is called a ​ ​ ​ (a)  

• dilation

• rotation

• reflection

• translation