EXERCISES
For more practice, see Extra Practice.
A
A
Practice by Example
A scale drawing has a scale of 3 in. : 10 ft. Find the actual length
Algebra
for each drawing length.
Example 1
(page 275)
1. 21 in.
2. 15 in.
3. 6 in.
4. 45 in.
5. 13.5 in.
6. 1.5 in.
Geography Find the actual distance
Example 2
(page 276)
between each pair of cities. Use a ruler
Hartford
to measure. Round to the nearest mile.
C O N N E C T I C U T
7. Hartford and Danbury
Norwich
Danbury
New Haven
N
8. Norwich and Hartford
W
E
S
9. New Haven and Norwich
0
53 mi
1 in. : 53 mi
10. New Haven and Danbury
11. Architecture The height of a building in an architectural drawing is
Example 3
(page 276)
10 in. Its actual height is 150 ft. What is the scale of the drawing?
12. The width of the scale drawing of a sofa is 15 cm. The actual width of
the sofa is 150 cm. What is the scale of the drawing?
1 cm
B
B
The scale of a map is
. Find the actual distance for each map distance.
3.75 km
13. 8 cm
14. 20 cm
15. 28 cm
16. 16 mm
17. 24 mm
18. 50 mm
Writing in Math
19.
You are making a scale drawing with a scale of
2 in. = 17 ft. Explain how you decide how long you should draw an
object that has an actual length of 51 ft.
20.
Reasoning
The scale of a drawing is 5 cmi1 mm. Is the scale drawing
larger or smaller than the actual figure? Explain.
21. Architecture The blueprint is a scale drawing of an apartment. The
dimensions of the master bedroom are 12 ft 3 20 ft.
1
1 in.
4
1 in.
1
3
1 in.
1 in.
in.
4
4
a. Complete: The scale is
i4 ft.
j
b. Sketch a copy of the floor plan. Write the actual dimensions in place
of the scale dimensions.
277-279
5-7 Maps and Scale Drawings