Dilations - PreTest

What is the definition of dialations ,in mathematical terms?

• to make larger or smaller
• to make larger
• all of the above
• to make smaller

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

A dilation can produce a smaller figure or a(n)______

• reduction
• enlargement
• scale factor
• center of dilation

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

Which of the following are Dilations?

• (x, y) → (x, 3y)
• (x, y) → (3x, 3y)
• (x, y) → (x, y - 3)
• (x, y) → (.5x, .4y)

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

A triangle has vertices with coordinates (2,0), (3, -1) and (-2,-5). If the triangle is dilated by a scale factor of 3 with the origin as the center of dilation, what are the coordinates of the vertices of the image?

• (5,3), (6,2), (1,-2)
• (6,0), (9,-3), (-6,-15)
• (2/3,0), (1,-1/3), (-2/3,-5/3)
• (-1,-3), (0,-4), (-5,-8)

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

CCSS.8.G.A.5

What is the scale factor if the smaller rectangle is the original rectangle?

• 4
• .25
• 5
• 6

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

True of False: When you shrink a figure, you multiply by a fraction. 

• true
• false

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

True of False: When you expand a figure, you multiply by a whole number. 

• true
• false

Tags

CCSS.5.MD.C.5

CCSS.5.NF.B.5

True of False: a translation is when a figure slides on a coordinate plane right or left, or up or down. 

• True
• False

Tags

CCSS.8.G.A.1

CCSS.8.G.A.2

CCSS.8.G.A.3