|
2 |
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weights and measures. |
|
square measure. |
144 square inches (sq. in.) |
= |
1 square foot |
sq. ft |
9 square feet |
= |
1 square yard |
sq. yd. |
30¼ square yards |
= |
1 square rod |
sq. rd. |
160 square rods |
= |
1 acre |
A. |
640 square acres |
= |
1 square mile |
sq. mi. |
|
sq. mi. |
|
A. |
|
sq. rd. |
|
sq. yd. |
|
sq. ft. |
|
sq. in. |
1 |
= |
640 |
= |
102,400 |
= |
3,097,600 |
= |
27,878,400 |
= |
4,014,489,600 |
|
|
surveyor's square measure. |
625 square links (sq. li.) |
= |
1 square rod |
sq. rd. |
16 square rods |
= |
1 square chain |
sq. ch. |
10 square chains |
= |
1 acre |
A. |
640 acres |
= |
1 square mile |
sq. mi. |
36 square miles |
= |
1 township |
Tp. |
|
1 sq. mi. = 640 A. = 6,400 sq. ch. = 102,400 sq. rd. = 64,000,000 sq. li. |
The acre contains 4,840 sq. yd., or 43,560 sq. ft., and is equal to the area of a square measuring 208.71 ft. on a side. |
|
cubic measure. |
1,728 cubic inches (cu. in.) |
= |
1 cubic foot |
cu. ft. |
27 cubic feet |
= |
1 cubic yard |
cu. yd. |
128 cubic feet |
= |
1 cord |
cd. |
24¾ cubic feet |
= |
1 perch |
P. |
1 cu. yd. = 27 cu. ft. = 46,656 cu. in. |
|
|
measure of angles or arcs. |
60 seconds (") |
= |
1 minute |
' |
60 minutes |
= |
1 degree |
° |
90 degrees |
= |
rt. angle or quadrant |
□ |
360 degrees |
= |
circle |
cir. |
|
1 cir. = 360° = 21,600' = 1,296,000" |
|
useful tables |
|
2 |
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