Wentworth and Hill's Exercise Manuals: Arithmetic, Issue 1

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Ginn & Company, 1886 - Arithmetic - 296 pages
 

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Page 80 - For the purpose of measuring angles, the circumference is divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes; each minute into 60 equal parts, called seconds.
Page 218 - A circle is a plane figure bounded by a curved line, called the circumference, every point of which is equally distant from a point within called the center.
Page 77 - 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.
Page 218 - It follows that the ratio of the circumference of a circle to its diameter is the same for all circles.
Page 78 - CUBIC MEASURE 1728 cubic inches (cu. in.) =1 cubic foot (cu. ft.) 27 cubic feet = 1 cubic yard (cu. yd.) 128 cubic feet = 1 cord (cd...
Page 78 - LIQUID MEASURE 4 gills (gi.) = 1 pint (pt.) 2 pints = 1 quart (qt.) 4 quarts = 1 gallon (gal...
Page 196 - The area of any polygon may be found by dividing it into triangles by means of diagonals, computing the areas of these triangles, and adding the results.
Page 189 - The sum of the angles of a triangle is equal to two right angles, or 180.
Page 167 - If 32 meters equal 35 yds., and a brass rod 1.5 meters long weighs 19 lbs. 11 oz., find the weight of an inch of this rod. 105. If 7 men in 25 dys. of 10 hrs. each earn $219, how many hours a day should 12 men work to earn $262.80 in the same number of days ? 106.
Page 79 - Thirty days hath September, April, June, and November, February has twenty-eight alone, All the rest have thirty-one; Excepting leap year, that's the time When February's days are twenty-nine.

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