Dilations

If k=1.25 (k is scale factor), then a dilation will result in a(n)______

• reduction
• enlargement
• scale factor
• center of dilation

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

What is the scale factor from ΔDEF to ΔABC?

• 1/2
• 7/3
• 2
• 10/3

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

CCSS.8.G.A.5

Dilate Point B by a scale factor of 3:

• (12,0)
• (12,12)
• (4,3)
• (0,12)

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

Does the image show a dilation?

• Yes
• No

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

Choose the correct scale factor:

• 2
• 3
• 1/3
• 1/2

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

A scale factor of less than one means

• that the image will be larger than the pre-image.
• That the image will be the same as the pre-image.
• That you need to subtract that amount off  of each side.
• That the image will be a reduction of the pre-image.

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

What is the scale factor if the triangle on the left is the original?

• 2
• 3/2
• 2/3
• 1/2

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

What is the scale factor from MNOP to ABCD?

• 2/3
• 1/2
• 3/2
• 2

Are the polygons similar?

• Yes, because the scale factor is 4:9
• Yes, because the scale factor is 1:2
• No, because the rectangles are different sizes
• No, because they have different scale factors

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

Similar figures have the same ______ but different ______. 

• measure; shapes
• sizes; shapes
• value; measures
• shape; sizes

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4