2. Multiply continually together the twodiameters a b, c d, and the number 11. Dividethe last product by 14, and the quotient will bethe area nearly true. Example.—What will be the area of theellipse A D E c A, its transverse a b being 15feet, and its conjugate c d 10 feet? … THE DECORATOR S ASSISTANT. 195 1510 150 11 J 2) 1650 7) 825.00 117.85 sq. ft. = area. 3. Multiply continually together the twodiameters, and the number .7854, and theproduct will be the area of the ellipse. Example.—What will be the area of anellipse, the transverse being 25 inches, andconjugate 18…
Design · Decoration and ornament · Art
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