| George Edward Atwood - Arithmetic - 1894 - 396 pages
...separately, find the product of the half sum and the three remainders, and extract its square root. 431. **To find the area of a trapezoid. RULE. — Multiply half the sum of the,** parallel sides by the altitude. 432. To find the area of a trapezium. RULE. — Multiply the diagonal... | |
| Mines and mineral resources - 1894 - 330 pages
...as in previous problem. Fig. 49. PROB. V 1 1 . — To find the area of a trapezoid. Multiply half of **the sum of the two parallel sides by the perpendicular distance between them,** and p .c the product will be the / \ area. / \ \ Example. — Let ABCD (Fig. 49) be a trapezoid. The... | |
| Thomas Aloysius O'Donahue - Mine surveying - 1896 - 184 pages
...multiply the base by half the perpendicular. PROB. VII. To find the area of a trapezoid. Multiply half of **the sum of the two parallel sides by the perpendicular distance between them,** and the product will be the area. Let ABCD (Fig. 61) be a trapezoid. The side EC = 40, Fio. 61. Pra.... | |
| William Dorrance Beach - Military field engineering - 1897 - 302 pages
...the area of a rectangle. Multiply the base by the height. To find the area of a trapezoid. Multiply **the sum of the two parallel sides by the perpendicular distance between them** and take half the product. To find the area of a triangle. Multiply the base by the altitude and take... | |
| Alfred John Pearce - 1897 - 202 pages
...of which is 1 yd. 10. June, 1890.— Prove that the area of a trapezoid is one-half the. product of **the sum of the two parallel sides by the perpendicular distance between them.** The area of a trapezoidal field is 4J ac. ; the perpendicular distance between the parallel sides is... | |
| Joshua Rose - Engines - 1899 - 478 pages
...in Fig. 94. Its altitude or height is the distance between its paralell sides, as E in the figures. **To find the area of a trapezoid. Rule. Multiply half the sum of the two** paralell sides by the altitude. H 0 D Fig. 94. In an ellipse the line A, Fig. 95, represents the "major,"... | |
| George Edward Atwood - Arithmetic - 1899 - 392 pages
...separately, find the product of the half sum and the three remainders, and extract its square root. 431. **To find the area of a trapezoid. RULE. — Multiply half the sum of the** parallel sides by the altitude. 432. To find the area of a trapezium. RULE. — Multiply the diagonal... | |
| Floyd Davis - Mining engineering - 1900 - 148 pages
...is the area of a trapezoid determined? A. The area of a trapezoid is found by multiplying one-half **the sum of the two parallel sides by the perpendicular distance between them.** Q. 87. What is the area of a trapezoid whose two parallel sides are 12 and 16 feet respectively, and... | |
| Nehemiah Hawkins - Steam engineering - 1901 - 354 pages
...To find the area of a Trapezoid. NOTE. A Trapezoid is a trapezium having two of its sides parallel. **RULE. Multiply half the sum of the two parallel sides by the perpendicular distance between them.** k Fig. 38. Let the figure be the trapezoid, the sides 7 and 5 being parallel; and 3 the perpendicular... | |
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