Civil Engineering Reference
In-Depth Information
A
B
1
2
3
4
5
6
D
C
LENGTH 3 IN.
Figure 5-7 Square measure. If the rectangle ABCD measures
2 inches on one side and 3 inches on the other, and lines are
drawn at each inch division, then each of the small squares will
have an area of 1 square inch and the area of the rectangle
will be area ABCD
=
breadth
×
length
=
2
×
3
=
6 square
inches.
Table 5-5
Square Measure
Measure
Equivalent
Equivalent
144 square inches
1 square foot
9 square feet
1 square yard
30
1
/
4
square yards
1 square rod
272.25 square feet
160 square rods
1 acre
4840 square yards or
43,560 square feet
640 acres
1 square mile
3,097,600 square yards
36 square miles
1 township
As with square measure, the usual linear units (inches, feet,
and yards) are ordinarily used to measure these three dimensions.
Most small measurements of capacity (such as small shipping cases
or small cabinets) are measured in cubic inches. The contents of
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