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Lesson 3 - Scale Factors



 1. 

  mc001-1.jpg is similar to mc001-2.jpg. Side KL corresponds with which side on mc001-3.jpg?

       mc001-4.jpg
a.
JL
b.
PR
c.
QR
d.
PQ
 

 2. 

Refer to mc002-1.jpg and mc002-2.jpg in question 1. Complete the ratio.
mc002-3.jpg
 
a.
5.9
b.
7.2
c.
33.2
 

 3. 

Refer to the triangles in question 1. What is the scale factor for the enlargement of mc003-1.jpg to mc003-2.jpg
a.
4 : 1 or 4 or 400%
c.
1 : 4 or 0.25 or 25%
b.
1 : 2 or 0.5 or 50%
d.
2 : 1 or 2 or 200%
 

 4. 

Refer to mc004-1.jpg in question 1. What is the length of JL?
a.
16.6 cm
b.
23.6 cm
c.
7.2 cm
d.
8.3 cm
 

 5. 

Refer to mc005-1.jpg in question 1. What is the length of PQ?
a.
11.8 cm
b.
8.3 cm
c.
16.6 cm
d.
23.6 cm
 

 6. 

A scale factor of a shape reduced to 40% can be represented by which amount?
a.
2.5
b.
40
c.
mc006-1.jpg
d.
4
 

 7. 

The ratios of the side lengths of mc007-1.jpg to the corresponding side lengths of mc007-2.jpg are 2 : 3. What is the length of side AB?
             mc007-3.jpg

a.
1.4 km
b.
0.7 km
c.
3.5 km
d.
2.8 km
 

 8. 

Refer to question 7. What is the length of side DF in mc008-1.jpg?
a.
3.6 km
b.
2.7 km
c.
0.9 km
d.
1.5 km
 

 9. 

The scale on a map of a region shows that 2 cm represents 5 km. City of Westwood Heights is 12 cm from the Town of Southgate on the map. How far apart are Westwood Heights and Southgate?
a.
25 km
b.
60 km
c.
30 km
d.
45 km
 

 10. 

Refer to quesiton 9. What is the scale factor between the map and the region?
a.
100 000
b.
350 000
c.
500 000
d.
250 000
 



 
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