iculars b fand D E; then, 1. Multiply the diagonal by the sum of thetwo perpendiculars, and half the product willbe the answer. Or, 2. Divide the trapezium into two triangles,and the sum of the areas of these triangles willgive the area required. Example.—How many square feet are therein a… … Multiply the sum of the parallel sides a band D c by the perpendicular distance betweenthem, E c, and half the product will be thearea. Example.—Required the area of a trapezoidof which the parallel sides are 120 feet and 90feet, and the perpendicular distance 40 feet ? 12090 210 40 2) 8400 4200…
Design · Decoration and ornament · Art
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