Dilation

What is Dilation?

• Dilation means to enlarge or reduce
• Dilation means to reflect on something
• Dilation means to like something
• Dilation means to make something different by making it smaller

A triangle has vertices A(0,0), B(8,0), C(3,-2). Find the coordinates of the triangle after a dilation with a scale factor of  4. The dilation is (X,Y) --- (4x,4y)

• A(3,3), B(4,4), C(-3,-4)
• A(-4,8), B(6.5,8), C(7,7)
• A(0,0), B(32,0), C(12,-8)

Does the image show a Dilation?

• Yes
• No

The __________ is the ratio of new/old

• reduction
• enlargement
• scale factor
• center of dilation

Dilate Point A by a scale factor of 1/2

• (-4,-4)
• (-1,-4)
• (-1,-1)
• (-2,-2)

Tags

CCSS.8.G.A.3

Definition: The figure after a transformation has occurred. 

• Pre-image
• Image
• Translation
• Reflection

Tags

CCSS.HSG.CO.A.2

Definition: The figure before a transformation has occurred. 

• Pre-image
• Image
• Translation
• Reflection

Tags

CCSS.HSG.CO.A.2

• A
• B
• C
• D

Choose the correct scale factor:

• 2
• 3
• 1/3
• 1/2

Tags

CCSS.8.G.A.3

Choose the correct scale factor:

• 2.5
• 1.5
• 3.5
• 4

Tags

CCSS.8.G.A.3