Dilations/Similar Figures STAAR Review

When you dilate, you ______ x and y by a number.

• Multiply
• Add
• Subtract
• Divide

Tags

CCSS.8.G.A.3

Dilations are ________ but not congruent.

• Similar
• Flipped
• Rotated
• Congruent

Tags

CCSS.8.G.A.3

A figure with the coordinates A(3,3) B(6,6) C(9,3) is dilated by a scale factor of 3 with the origin as the center of dilation. What are the coordinates of the image?

• A'(9,9) B'(18,18) C'(27,9)
• A'(6,6) B'(9,9) C'(12,6)
• A'(0,0) B'(3,3) C'(6,0)
• A'(1,1) B'(2,2) C'(3,1)

Tags

CCSS.8.G.A.3

Choose the correct scale factor:

• 2
• 3
• 1/3
• 1/2

Tags

CCSS.8.G.A.3

The point A (8, 12) was dilated to become point A' (2, 3). What was the scale factor?

• ½
• ¼
• 4
• 2

Tags

CCSS.8.G.A.3

Find the perimeter of the large triangle.

• 24
• 36
• 12
• 54

A rectangle has an area of 48 cm². It is dilated by a scale factor of 2. What would be the area of the new rectangle (the image)?

• 96 cm²
• 192 cm²
• 216 cm²
• 2304 cm²

Tags

CCSS.7.G.A.1

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.

Tags

CCSS.HSG.SRT.A.2

The pair of figures is similar. Find the missing side.

• x = 12
• x = 3
• x = 40
• x = 4

Tags

CCSS.HSG.SRT.A.2

To find the height of a very tall pine tree, you place a mirror on the ground and stand where you can see the top of the pine tree.  How tall is the tree?

• 144 feet
• 72 feet
• 36 feet

Tags

CCSS.HSG.SRT.B.5