 | Robert Stuart - 1854 - 1272 σελίδες
...hypothenuse AC, when the square of 189 AB has been subtracted. 189 Prob. 4. To find the area of a trapezoid. Multiply the sum of the two parallel sides by the...perpendicular distance AP or CN is 9 : required the area. 7 ia 19 9 171 85J area. Prob. 5. To find the area of a trapezium. ...' Cue/or any trapezium. — Divide... | |
 | Charles Guilford Burnham - 1857 - 342 σελίδες
...What is the area ? Ans. 24 chains. Art. 271 . — To find the area of a trapezoid. RULE. Multiply half the sum of the two parallel sides by the perpendicular distance between them : the product will be ilie area. 1. What is the area of a piece of land that is 30 chains long, 20... | |
 | Charles Guilford Burnham - 1857 - 328 σελίδες
...What is the area ? Ans. 24 chains. Art. 271. — To find the area of a trapezoid. RULE. Multiply half the sum of the two parallel sides "by the perpendicular distance between them : the product will be the area. 1. What is the area of a piece of land that is 30 chains long, 20 chains... | |
 | Anthony Nesbit - 1859 - 494 σελίδες
...? Ans. 1131 ft. 2 in. 9 pa. PROBLEM To find the area of a trapezoid. RULE. Multiply the sum of the parallel sides by the perpendicular distance between them, and half the product will be the area. Or, half the sum of the sides multiplied by their distance will give the area. EXAMPLES. 1 . What is... | |
 | Alfred Newsom Niblett - 1861 - 204 σελίδες
...NB—In this figure the dotted lino shows the perpendicular height. RULES. Multiply the sum of the parallel sides by the perpendicular distance between them, and half the product will be the area. Or, half the sum of the sides multiplied by their distance will give the area. PEOBLEM 5. To find the... | |
 | Josiah Lyman - 1862 - 92 σελίδες
...area of the field. SECOND METHOD. (S9.) BY TRAPEZOIDS AND TRIANGLES. For a Trapezoid, the rule is, Multiply the sum of the two parallel sides by the perpendicular distance between them. Half the product will be the area. For a Triangle, Multiply the base by the perpendicular height, and... | |
 | Oliver Byrne - 1863 - 600 σελίδες
...a trapezoid, or a quadrangle, two of whose opposite sides are parallel. — Multiply the sum of the parallel sides by the perpendicular distance between them, and half the product will be the area. Required the area of the trapezoid ABCD, whose sides AB and DC are 321-51 and 214-24, and perpendicular... | |
 | William John Macquorn Rankine - 1866 - 356 σελίδες
...by a pair of parallel straight lines, and a pair of straight lines not parallel). Multiply the half sum of the two parallel sides by the perpendicular distance between them. 3. Triangle. RULE A. — Multiply the length of any one of the sides by one-half of its perpendicular... | |
 | Isaac Todhunter - 1869 - 312 σελίδες
...and CD. Thus we obtain the rule which will now be given. 161. To find the area of a trapezoid. RULE. Multiply the sum of the two parallel sides by the...between them, and half the product will be the area. 162. Examples : (1) The two parallel sides of a trapezoid are 2 feet 6 inches, and 3 feet 4 inches... | |
 | Emerson Elbridge White - 1870 - 350 σελίδες
...altitude. 4. To find the area of any quadrilateral having two sides parallel, Multiply one half of the sum of the two parallel sides by the perpendicular distance between tiiem. 5. To find the circumference of a circle, 1. Multiply the diameter by 3.1416. Or, 2. Divide... | |
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Multiply the sum of the two parallel sides by the perpendicular distance between them, and half the product will be the area. 
