 Square Measure 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq. yd.) 30£ square yards = 1 square rod (sq. rd.) 160 square rods = 1 acre (A.) 640 acres = 1 square mile (sq.  A Grammar Shcool Arithmetic - Page 174by George Albert Wentworth - 1886 - 372 pagesFull view - About this book
 | Herbert Maryon - Crafts & Hobbies - 1971 - 404 pages
...Millimetres into inches multiply by 0-03937 SURFACE MEASURES 1 square inch (sq. in. ) = 645-16 sq. mm. 144 square inches (sq. in.) = 1 square foot (sq. ft.). 9 square feet (sq. ft.) = 1 square yard (sq. yd.) 1 square centimetre (sq. cm.) = 0-15498 square inches. 1 iquare... | |
 | 1973 - 1036 pages
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