 | Commissioners of National Education in Ireland - 1837 - 284 σελίδες
...34, DC 35, and BC 16 ; required its area. Am. 700.99. PROBLEM XIII. To find the area of a Trapezoid. RULE. Multiply half the sum of the two parallel sides by the perpendicular distance between them, and the product will give the area.* 1. Let ABCD be a trapezoid,... | |
 | George Willson - 1838 - 194 σελίδες
...figure. The "05*5" breadth of the rectangle is equal to naif the sum of the two parallel sides. . ... . RULE. — Multiply half the sum of the two parallel sides, by the perpendicular distance between them. All the figures we have considered, have been referred either... | |
 | Charles Guilford Burnham - 1841 - 324 σελίδες
...triangle are 6, 8 and 10 chains. What is the area ? Answer, 24 chains. To fold the area of a trapezoid. RULE. Multiply half the sum of the two parallel sides by the perpendicular distance between them, and the product will be the area. 1. What is the area of a piece... | |
 | George Roberts Perkins - 1850 - 364 σελίδες
...Hence the area of the trapezoid, which is the sum of the two-triangles, may be found by the following RULE. Multiply half the sum of the two parallel sides...width, GH, being multiplied by the length EF will give its area.' i EXAMPLES. 1. If the parallel sides of a trapezoidal garden are respectively 4 and 6 rods... | |
 | Charles Guilford Burnham - 1850 - 350 σελίδες
...8, and 10 chains. 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... | |
 | Charles Davies - 1852 - 344 σελίδες
...parallel. The ,. perpendicular CE is called the altitude. AEB 322. To find the area of a trapezoid. Multiply half the sum of the two parallel sides by the altitude, and the product will be the area. (Bk. IV. Prop. VII.) EXAMPLES. 1. Required the area of the trapezoid... | |
 | George Roberts Perkins - 1855 - 388 σελίδες
...Hence the area of the trapezoid, which is the sum of th« two-triangles, may be found by the following RULE. Multiply half the sum of the two parallel sides...fine application in measuring a tapering board, as ABCD. In this case half the sum of the parallel sides, AD and BC, is found by measuring the width GH... | |
 | Charles Guilford Burnham - 1857 - 342 σελίδες
...8, and 10 chains, 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... | |
 | Charles Guilford Burnham - 1857 - 328 σελίδες
...8, and 10 chains. 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... | |
 | George Roberts Perkins - 1865 - 360 σελίδες
...Hence the area of the trapezoid, which is the sum of the two-triangles, may be found by the following RULE. Multiply half the sum of the two parallel sides...middle of the board. This average width, GH. being nmltiplied by the length EF will give ;U area. EXAMPLES. 1. If the parallel sides of a trapezoidal... | |
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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. 
