Similar Figures and Slope

Which dilation moves triangle `GEF` onto triangle `G'EF'`?

• Center of dilation: G
  Scale factor: 1/2

• Center of dilation: G
  Scale factor: 2

• Center of dilation: E
  Scale factor: 1/2

• Center of dilation: E
  Scale factor: 2

Answer explanation

The correct dilation moves triangle GEF to G'EF' with center E and scale factor 1/2, reducing the size of triangle GEF while keeping E fixed, resulting in triangle G'EF'.

What is the scale factor from ΔABC to ΔDEF?

• 1/2

• 7/3

• 2

• 10/3

Which of the following is a scaled copy of figure A?

• B

• C

• D

Which side length on the scaled copy corresponds to the side length HJ on the original image?

• AB

• BC

• AC

Is Figure B a scaled copy of Figure A?

• Yes

• No

What is the scale factor from the small fry to the large fry?

• 1/3

• 48

• 4

• 3

Two objects that are the same shape but not the same size are _______.

• Congruent

• Vertical

• Similar

• Complementary 

Tell whether the two figures are similar. Explain your reasoning. (Hint: are they proportional?)

• Yes, similar because they are the same shape and side lengths are proportional.

• No, not similar because they are the same shape, but side lengths are not proportional.

• Yes, same shape

• No, different sizes

Are the following similar? Why or why not?

• Yes

• No, the corresponding angles are not equal.

• No, the ratios of the corresponding sides are not equal.

Find missing side

• 5

• 7

• 9

• 11