42 USEFUL TABLES 



USEFUL TABLES 



UNITS OF MEASUREMENT 



LINEAR MEASURE 



12 inches (in.) =1 foot ft. 



3 feet =1 yard yd. 



5} yards =1 rod rd. 



40 rods =1 furlong .... I fur. 



8 furlongs =1 mile mi. 



mi. fur. rd. yd. ft. in. 



1 = 8 = 320=1,760 = 5,280 = 63,360 



There are various other units of length, such as the league 

 = 3 mi.; the nautical mile = 6,080 ft.; the fathom = 6 ft.; the 

 hand = 4 in.; the span = Q in.; the cubit = 18 in. 



SQUARE MEASURE 



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



9 square feet =1 square yard sq. yd. 



30 J 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. ft. sq. in. 



1 = 640 = 102,400 = 3,097,600 = 27,878,400 = 4,014,489,600 



CUBIC MEASURE 



1,728 cubic inches (cu. in.) =1 cubic foot cu. 



27 cubic feet = 1 cubic yard cu. yd. 



128 cubic feet =1 cord cd. 



24 J cubic feet =1 porch P. 



1 cu. yd. = 27 cu. ft. = 46,656 cu. in. 



MEASURES OF ANGLES OR ARCS 



60 seconds (") =1 minute ' 



60 minutes =1 degree 



90 degrees = 1 rt. angle or quadrant . . D 



360 degrees =1 circle 



1 cir. = 300 -21, COO' = 1,296,000" 



