Unit 5 Test Review - Similarity and Dilations

Triangle ABC is dilated by a scale factor of 1/2. What are the coordinates of C'?

• (3,-1.5)
• (12,-6)

• (0,1.5)

• (3,1.5)

Tags

CCSS.8.G.A.3

Find the length of CD.

• 9.6
• 10.2

• 9.4

• 8.9

Tags

CCSS.HSG.SRT.A.2

Is this an enlargement or reduction? Find the scale factor.

• Enlargement; k=1/2

• Enlargement; k=2

• Reduction; k=1/2

• Reduction; k=2

Tags

CCSS.8.G.A.3

Triangle ABC has vertices A(-2,2), B(2,4), and C(3,-1). Find A' if the scale factor is 2.5.

• (-5,5)

• (-4,4)

• (5,-5)

• (4,-2.5)

Tags

CCSS.8.G.A.3

A streetlight’s shadow is 15 ft long. A 9 ft pole’s shadow is 6 ft long. What is the height of the streetlight?

• 22.5 ft

• 20 ft

• 23.5 ft

• 23 ft

Tags

CCSS.HSG.SRT.B.5

ABC is dilated so that C' is (2,-1). What is the scale factor of the dilation?

• k=1/3

• k=3

• k=1/2

• k=2

Tags

CCSS.8.G.A.3

Determine if figure A and figure B are similar or not.

• Similar

• Not similar

Tags

CCSS.HSG.SRT.A.2

If ABCD is dilated by a scale factor of 1/2, what is the perimeter of A'B'C'D'?

• 10

• 20

• 5

• 15

Tags

CCSS.8.G.A.3

Is this an enlargement or reduction? Find the scale factor.

• Enlargement; k=2

• Enlargement; k=1/2

• Reduction; k=2

• Reduction; k=1/2

Tags

CCSS.8.G.A.3

Give an example of a dilation rule (in coordinate notation) that will show a reduction. (x,y) --> ( ____ , ____ )

Tags

CCSS.8.G.A.3