2 USEFUL TABLES 



SQUARE MEASURE 



144 square inches (sq. in.) . = 1 square foot sq. ft. 



9 square feet = 1 square yard sq. yd. 



30i square yards = 1 square rod sq. rd. 



160 square rods = 1 acre A. 



640 acres = 1 square mile sq. mi. 



sq. mi. A sq. rd. sq. yd. sq. it. 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 (6 mi. 



square) =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. 



24f 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 = 1 it. angle or quadrant . . . . D 



360 degrees = 1 circle cir. 



1 cir. = 360 = 21, 600' =1,296,000" 



