Vocabulary
Scale factor
Identifying scaled copies
More Scales
More scaled figures
100
A figure that is enlarged or reduced
Scaled copy
100
The new image is smaller than before what do we know about the scale factor
Less than 1 but greater than 0
100
Which figures are a scaled copy of the original?
Copy 1 and Copy 2
100
Rectangle A measures 10 in by 5 inches. Rectangle B is a scaled copy. Which measurements could be the dimensions?
A. 9 in by 4 in
B. 5 in by 2.5 in
C. 15 in by 7.5 in
D. 20 in by 10 in
E. 11 in by 6 in
B, C, D
100
Which figures are a scaled copy of T?
B, E, D
200
Parts that are in the same position
Found in two related figures
Match in shape and proportional size
Corresponding parts
200
What is the scale factor from the little to the big? 
Scale factor is 3
200
Which image is a scaled copy if A?
Image D
200
If you are scaling a shape what operations can you use to scale a shape?
(Add, subtract, multiply, or divide)
Multiply or divide
200
What is the scale factor from T to B?
1
300
The ratio by which a figure is enlarged or reduced
Scale factor
300
What is the scale factor from C to D?
Scale factor is 1/5
300
Is this a scaled copy?
Yes
300
How do you undo a scaled copy?
Multiply by the reciprocal
300
What is the scale factor from T to E?
2
400
Ratio showing relationship between distances
Used in maps and models
Example: 1 inch = 10 miles
Scale
400
How far away is the lighthouse and the anchor in on the scale drawing if the actual distance is 6 miles?
9 Inches
400
Are these images scaled copies of each other?
No
400
If you scale a shape up by 3, what scale would you use to bring it back to the original shape?
1/3
400
What is the scale factor from T to D?
1.5
500
When two numbers multiply to equal 1
Inverse of a scale factor
Reciprocal
500
How far away is Rhine Bone town from Digby town in real life with this scale?
24 miles
500
What happens to the angles of a shape if it is scaled by 1/2?
Nothing the angles stay the same.
500
If my image is scaled by a factor of 2/3, what scale factor would I need to use to get back to my original image?
3/2
500
What is the scale with no units if the original scale is 1in to 3 yards.
1 to 108