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" From half the sum of the three sides, subtract each side severally; multiply the half sum, and the three remainders together, and the square root of the product will be the area required. "
Principles of Architecture: Comprising Fundamental Rules of the Art, with ... - Side 92
av Peter Nicholson, Joseph Gwilt - 1848 - 280 sider
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The artillerist's manual, and compendium of infantry exercise

Frederick Augustus Griffiths - 1839
...product will be the area. To find the area of a triangle whose three sides are given.—From half the sum of the three sides, subtract each side severally;...square root of the product will be the area required. Two sides of a right angled triangle being given to find the third side.—When the two sides forming...
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The artillerist's manual, and compendium of infantry exercise

Frederick Augustus Griffiths - 1840
...Square yards. Area required. To find the Area of a Triangle, whose three Sides are given. From half the sum of the three sides, subtract each side severally...of the product will be the Area required. Example. — Required the Area of a Triangle, whose sides are 50, 40, and 30 feet. 50 + 40 + 30.. fin half sum...
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Crocker's Elements of land surveying. To which are added, Tables of six ...

Abraham Crocker - 1841
...the area. RULE II. When the three sides are given. Add the sides together. From half the sum of the sides subtract each side severally. Multiply the half sum and the three remainders together, and the square-root of the last product will be the area. That is, •/a + b + c^ — a + b + c a— b + ca...
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United States Calculator: Or, Arithmetic Simplified

John M'Nevin - 1841 - 280 sider
...sum, subtract each side severally; from the half sum multiply the half sum and the three differences together, and the square root of the product will be the area. 1. Required the area of a right angled triangle whose base is 40 and perpendicular 30 perches? Ans....
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The United States Calculator: Or, Arithmetic Simplified, in Dollars and ...

John M'Nevin - 1841 - 280 sider
...sum, subtract each side severally; from the half sum multiply the half sum and the three differences together, and the square root of the product will be the area. 1. Required the area of a right angled triangle whose base is 40 and perpendicular 30 perches? Ans....
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The operative mechanic's workshop companion, and the scientific gentleman's ...

1845
...area. When only the three sides of a triangle can be given, to find the area. Rule. — From half the sum of the three sides, subtract each side severally...remainders together, and the square root of the product is equal the area required. Required the area of a triangle, whose three sides are respectively 50,...
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Watson's Tutor's assistant: or, Complete school arithmetic

William Watson (of Beverley.) - 1845
...crooked fence, so as to include as much on one side as they exclude on the other. remainders continually together, and the square root of the product will be the area. EXAMPLES. I . Required the area of a triangle, the sides of which are 26, 28, and 30. 26 28 42 42 42...
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The Practical Engineer's Pocket Guide: Containing a Concise Treatise on the ...

1847 - 178 sider
...XT7S I When only the three sides of a triangle can be given, to find the artaRule — Prom half the sum of the three sides subtract each side severally...remainders together, and the square root of the product is equal the area requiredRequired the area of a triangle, whose three sides are respectively 50, 40,...
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A Complete Treatise on Practical Land-surveying, in All Its Departments ...

Anthony Nesbit - 1847 - 426 sider
...method. 4. When the three sides of a triangle are given, the area may be found as follows. From half the sum of the three sides subtract each side severally ; multiply the half sum and the three remainders continually together, and the square root of the last product will be the area required. This method...
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The United States Arithmetic: Designed for Academies and Schools

William Vogdes - 1847 - 256 sider
...does it contain ? PROBLEM XI. Given three sides of a triangle, to find the area. RULE. From half the sum of the three sides subtract each side severally. Multiply the half sum and the three remainders continually together, and the square root of the product will be the area required. EXAMPLES 1. What...
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