1/25 Day 3: Scale CopieS

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What is the scale factor from Figure A to Figure B? _______ 

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Are the triangles below similar? _______ 
What is the scale factor if the second triangle is a scaled copy of the first? _______ 

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Are these figures similar? Use the follow ratios from the corresponding sides to prove if they are proportional. 40/10 and 56/14
 
Are these ratios proportional? _______ 
Using the scale factor, find the value of x. _______ 

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Use the graph below to answer the following questions. 

What is the slope of the line? _______ 
Are the points (2,1) and (8,4) proportional? _______ 
Which of the following points could also be on the line? 
(40, 20) _______ 
(19, 11) _______ 
(24, 12) _______ 

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What is the value of x? _______ 
What is the perimeter of the first triangle? _______ 

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Figure B is a scaled copy of Figure A.

If figure A is half the size of figure B, what would be the value of x? _______

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Draggable item		Corresponding Item

7.G.1

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The following triangles are similar.


What is the missing side of the second  triangle? __________
What is the perimeter of the second triangle? __________

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What is the scale factor?

A.2.a

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A.2.a

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 The following triangles are similar. 
What is the scale factor? _______ 
What is the measure of YZ? _______ 
What is the measure of XZ? _______ 
What is the perimeter of the scaled triangle? _______ 

A.2.a

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Create a scaled copy of the figure below in the show your work box. 

1/25 Day 3: Scale CopieS

What is the scale factor?

Match each polygon on the left to it's scale copy on the right (click & drag the one on the left side to match the one on the right).

Li says the larger T is a scaled image of the smaller T because the larger T is twice the height of the smaller T. Do you agree with Li? Explain why or why not in the show your work section.

Identify the scaled copy of o.

What is the scale factor?

Which of the triangles P, Q, R, and S are reductions of triangle X?