Scale Copies I
Scale Copies II
Vocabulary
The Factor
100
What is a scaled copy?
A shape that has been enlarged or reduced.
100
What are corresponding parts?
A point, segment, or angle in the same position but on a different figure.
100
When the copy is bigger than the original it was
Enlarged
100
What is a scale factor?
The number that you multiplying the scale copy by to figure out the actual measurements
200
What are the two requirements for a scaled copy?
1) ALL distances/sides must be multiplied by the same number.
2) ALL of the angles must stay the same.
200
What is the corresponding part to point A and Point B?
Point E corresponds to Point A
Point F corresponds to Point B
200
When the copy is smaller than the original it was
Reduced
200
What will happen to the shape when your scale factor is greater than 1?
Example: scale factor = 2
The scale copy will be enlarged (bigger)
300
Is this a scaled copy?
Yes, it is!!
300
DAILY DOUBLE!!!!!!!
Is Miss. McKinley right handed or left handed?
300
If the lengths are multipled by a number greater than 1 the copy is
Enlarged
300
What will happen to the shape when your scale factor is less than 1? (or when you divide by the scale factor)
Example: scale factor =
1/2
The scale copy will be reduced (smaller).
400
The number each length is multiplied by is called
Scale Factor
400
Rectangle A is 8 in by 2 in.
Select all of the measurements that would create scaled copies of Rectangle A.
A: 40 in by 10 in
B: 10 in by 2.5 in
C: 9 in by 3 in
D: 7 in by 1 in
E: 6.4 in by 1.6 in
Measurements A, B, and E.
400
If the lengths are multipled by a number less than 1 the copy is
Reduced
400
Find the scale factor
The scale factor is 2
500
Which one is not a scaled copy? Be ready to explain why.
Copy 3 is not a scaled copy because every side was not multiplied by the same scale factor.
500
There are two different scaled copies of a rectangle.
The scale of the first copy is 1cm = 10m.
The scale of the second copy is 1cm = 50m.
If the length of the rectangle is 15 cm on the first scale copy, how long will it be on the second?
The length on the second scaled copy would be 3cm.
Reasoning: On the first scale drawing ...
1cm = 10m so 15cm = 150m
That means on the second drawing
if 1cm = 50m then 150m would equal 3cm
500
Find the scale factor
The scale factor is 1.5