CL Dilations topic 2

Topic 2

Dilations​

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Open Ended

What is a dilation of a figure?

what happens to the figure after a dilation?

A dilation of a figure is ......

What is a dilation ?

​Transforms a figure

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​when a shape is dilated

it can ENLARGE (get larger)

or

it can ​REDUCE(get smaller)

​

The image will keep the SAME shape

but NOT the same size. ​

Poll

The image represents a dilation , by looking at this image does it represent an ENLARGEMENT or a REDUCTION?

• enlargement

• reduction

• neither

Poll

what scale factor (k) best represents the dilation shown

• k=1

• k=1/2

• k=2

Poll

the image represents a dilation, does this image represent an enlargement or a reduction ?

• enlargement

• reduction

• neither

Open Ended

in order to perform a dilation that will shrink the figure the scale factor has to be ........

SENTENCE STEM

in order to create a smaller image , the scale factor has to be a number .......

Multiple Select

Select all THREE algebraic rules that will represent a REDUCTION

(use your calculator to turn fractions into decimals CONTROL )

• (1/2x,1/2y)

• (3/4x,3/4y)

• (4/3x,4/3y)

• (10/15x,10/15y)

• (3/2x,3/2y)

Open Ended

How do you know when a scale factor represents an enlargement?

A scale factor represents a enlargement when ________________

Multiple Choice

what is the scale factor of the figures shown?

IMAGE

PREIMAGE

 

• 3

• 2

• 1.5

• 0.5

Multiple Select

select TWO of the algebraic rules that represent a dilation

• (2x,2y)

• (1/4x,1/4y)

• (x+4 ,y-3)

• (x+1, 3y)

Open Ended

John says that the following rule represents a dilation

(x+2,y-2)

is john correct? why or why not

i think John is ____________ because ___________