 | Frank Eugene Kidder - 1921 - 1944 σελίδες
...and divide the product by 2. Thus, aiX (« + <«) To find the area of a trapezoid (Fig. 18). Rule. Multiply the sum of the two parallel sides by the perpendicular distance between them and divide the product by 2. To compute the area of an irregular polygon. Part 1 To find the area of a... | |
 | R. H. Warn, John G. Horner - 2002 - 292 σελίδες
...area of a trapezoid, which has only two of its sides parallel, is obtained by the rule — Rule 5. — Multiply the sum of the two parallel sides by the...between them, and half the product will be the area. A quadrilateral is a rectilineal figure with four sides. But it is convenient to separate the quadrilaterals... | |
 | 1905 - 572 σελίδες
...trapesoid, or a quadrangle, two of ivhose opposite sides are parallel. Rule — Multiply the sum of the parallel sides by the perpendicular distance between them, and half the product will be the area. DC A E, Fig. 8. Ex. i — What is the area of a trapezoid, Fig. 8, whose sides AB and DC are 20.5 and... | |
 | 1897 - 734 σελίδες
...twice the area of the triangle. To find the area of a trapezoid — (19) Multiply the sum of the iivo parallel sides by the perpendicular distance between them, and half the product is the area. FIG. 32. That is, £ (AD + BC) XEB = area. To find the area of any rectilineal figure... | |
| |
Multiply the sum of the two parallel sides by the perpendicular distance between them, and half the product will be the area. 
