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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 174
by George Albert Wentworth - 1886 - 372 pages

## Teachers' Manual of Elementary Arithmetic: Including Oral, Slate, and ...

Malcolm MacVicar - Arithmetic - 1880 - 268 pages
...UNITS. 1. Used in measuring the surface of land, boards, plaster, etc. 144 square inches (sq. in.) make 1 square foot . . sq. ft. 9 square feet " 1 square yard . sq. yd. 30J square yards " 1 sq. rod or perch sq. rd., P. 160 square rods " 1 square acre . A. 2. Used by surveyors...

## A Practical Arithmetic

George Albert Wentworth, Thomas Hill - Arithmetic - 1881 - 446 pages
...a second, what is its rate in miles per hour ? (One hour = 3600 seconds.) ono MEASURES OP SURFACE. 144 square inches (sq. in.) = 1 square foot (sq. ft.) . 9 square feet = 1 square yard (sq. yd.). 30i square yards, or) . , . , «>,r,, j- ar = 1 square rod (sq. rd.). 272i square feet J 160 square...

## The Complete Arithmetic: Oral and Written

Henry Bartlett Maglathlin, Benjamin Greenleaf - Arithmetic - 1831 - 386 pages
...Surface, or Square Measures are those used in measuring surfaces. TABLE. 144 square inches (sq. in.) are 1 square foot, sq. ft. 9 square feet " 1 square yard, sq. yd. 3(ty square yards, or 272J sq. ft. " 1 square rod, sq. rd. 160 square rods " 1 acre, A. 640 acres "...

## A Brief Course in Arithmetic: Oral and Written : on the Basis of Works by ...

Henry Bartlett Maglathlin - Arithmetic - 1881 - 200 pages
...angles. 136. Square Measures are those used in measuring surfaces. TABLE. 144 square inches (sq. in.) are 1 square foot, sq. ft. 9 square feet " 1 square yard, sq. yd. 30J square yards " 1 square rod, sq. rd. 160 square roda " 1 acre, A. 12. How many square inches in...

## A Practical Arithmetic

George Albert Wentworth, Thomas Hill - Arithmetic - 1882 - 376 pages
...a second, what is its rate in miles per hour ? (One hour = 3600 seconds.) nnq MEASURES OF SURFACE. 144 square inches (sq. in.) = 1 square foot (sq. ft.)...feet = 1 square yard (sq. yd.). 30} square yards, or) .. , , , . 0»oi tjr — 1 square rod (sq. rd.). 272} square feet J ' \--rv 160 square rods, or! ,...

## A Practical Arithmetic

George Albert Wentworth, Thomas Hill - Arithmetic - 1882 - 376 pages
...a second, what is its rate in miles per hour ? (One hour = 3600 seconds.) OQO MEASURES OF SURFACE. 144 square inches (sq. in.) = 1 square foot (sq. ft.) . 9 square feet = 1 square yard (sq. yd.). 301 square yards, or') , . . , . -- ^ , . \ = 1 square rod- (sq. rd.). 2721 square feet J ' ' 160 square...

## A Graded Spelling-book, Being a Complete Course in Spelling for Primary and ...

Henry Francis Harrington - Spellers - 1880 - 208 pages
...mile — 1 knot. Surface or Square Measure. Surface or Square Measure is used in computing surfaces. 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.). 12 inches (in ) — 1 foot...

## The Complete Arithmetic, Oral and Written, on the Basis of Works

Henry Bartlett Maglathlin - Arithmetic - 1882 - 398 pages
...used in measuring surfaces. An Inch Hyuan, or Square Inch. TABLE. 144 square inches (sq. in.) are ] square foot, sq. ft. 9 square feet " 1 square yard, sq. yd. 30£ square yards, or 272 \ sq. ft. " 1 square rod, sq. rd. 160 square rods " 1 acre, A. 640 acres " 1 square mile, or section,...