Parallelopiped, vb h. § 488. Pyramid, v = bh. § 515. Lateral, Aps. § 501. Frustum of pyramid, vh (b + b + √bb'). §519. Lateral area, A = {s (p + p'). Ex. 468. Cylinder, v = r2 h. Lateral area, A §.571. 2πr h. § 567. Entire area, A 2 πr (r + h). Ex. 497. 2 Right circular cone, v = r2 h. § 600. Lateral area, A =πrs. § 596. 2 Frustum, v= 1 π h (r2 + y22 + rr') § 602. Lateral area, Aπs (r+r). § 602. Sphere, A = c d = 4 v = r A = = πγε π r2 = π d2. §§ 687, 689. Lune, A2 a T. § 678. Spherical triangle, A E T. Spherical sector, vrh. § 697. Spherical segment, v = 1⁄2 π h (r' + r") + f π h3. METRIC MEASURES. 10 decimeters LINEAR MEASURE. 10 millimeters, marked mm., are 1 centimeter, marked cm. 10 meters 10 dekameters 10 hektometers 10 kilometers Mm. REM. The measures chiefly used are the meter and kilometer. The meter, like the yard, is used in measuring cloth and short distances; the kilometer is used in measuring long distances. 10 centiliters, marked cl., are 1 deciliter, marked dl. MEASURES OF WEIGHT. The gram is the unit of weight; it is legal at 15.432 grains. TABLE. 10 milligrams, marked mg., are 1 centigram, marked cg. Dry measure is used in measuring grain, vegetables, fruit, REM. The standard unit of dry measure is the; bushel it is a cylindrical measure 18 inches in diameter, 8 inches deep, and contains 2150 cubic inches. 4 quarts 1 quart, qt. 1 gallon, gal. REM. The standard unit of liquid measure is the gallon, which contains 231 cubic inches, 3.785 liters. Troy weight is used in weighing gold, silver and jewels. 24 grains (gr.) make 1 pennyweight, marked pwt. 12 ounces 1 pound, OZ. The standard unit of all weight in the United States is the Troy pound, containing 5760 grains. Long measure is used it measuring distances, or length, REM. The standard unit of length is the yard. yard for the United States is preserved at Washington. standard is kept at each State capital. The standard A copy of this |