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書籍 To find the Area of a Triangle when the Three Sides are given. Rule. — From half... の書籍検索結果
" To find the Area of a Triangle when the Three Sides are given. Rule. — From half the sum of the three sides subtract each side separately. "
A Treatise on Surveying, Containing the Theory and Practice: To which is ... - 97 ページ
John Gummere 著 - 1814 - 346 ページ
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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 +...

Arithmetical Spyglass and Teacher's Assistant: Intended as a Key and ...

Charles Waterhouse - 1842 - 166 ページ
...by means of the given proportion, the other sides may be found. PROB. IV. — To Measure a Triangle. RULE. — From half the sum of the three sides, subtract each side severally ; multiply these three remainders and the said half sum continually together ; the square root of the last product...

Elementary and practical Arithmetic on the inductive system, by analysis and ...

Charles WATERHOUSE - 1844 - 12 ページ
...ft.=192 ft., Ans. „ 3. To find the area of a triangle. RULE. — If the three sides only are given. — From half the sum of the three sides, subtract each side severally ; multiply these three remainders and the said half sum continually together ; and the square root of the last...

Engineers' and Mechanics' Pocket-book ...

Charles Haynes Haswell - 1844 - 264 ページ
...cd, and half the product will be the area. To find the Area of a Triangle by the length of its sides. RULE. — From half the sum of the three sides subtract each side separately ; then multiply the half sum and the \hree remainders continually together, and the square...

The operative mechanic's workshop companion, and the scientific gentleman's ...

William Templeton (engineer.) - 1845
...=206-34375 square feet, the 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...severally ; multiply the half sum and the three remainders together, and the square root of the product is equal the area required. Required the area of a triangle,...

Watson's Tutor's assistant; or, Complete school arithmetic

William Watson (of Beverley.) - 1845 - 180 ページ
...diagonal measuring 2 chains. Ans. 3a. Or. 18p. PROBLEM 3. — To find the area of a triangle, when three sides are given. RULE. From half the sum of...sides, subtract each side severally, multiply the lialf sum, and the three • These, and the following, should be laid down with a plotting scale. t...

Elements of Drawing and Mensuration Applied to the Mechanic Arts: A Book for ...

Charles Davies - 1846 - 240 ページ
...triangular field whose base is 15.48 chains, and altitude 9.67 chains? Ans. 7 A. 1 R. 38 P. 27. How do you find the area of a triangle when the three sides are given? 1st. Add the three sides together and take half their sum. 2d. From this half sum take each side separately....

The United States Arithmetic: Designed for Academies and Schools

William Vogdes - 1847 - 256 ページ
...perches : how many acres 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...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...

The Practical Engineer's Pocket Guide: Containing a Concise Treatise on the ...

1847 - 178 ページ
...su53-25 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 ; multiply the half sum and the three remainders together, and the square root of the product is equal the area requiredRequired the area of a triangle,...

A Complete Treatise on Practical Land-surveying: In All Its Departments ...

Anthony Nesbit - 1847 - 426 ページ
...= 120°. ..9.93753 1 25 Log. 4.332 ....... ..0.63664 4 1.328 _40 AKP 13.120 Am. 4 1 13 PROBLEM III. To find the Area of a Triangle when the three Sides are given. From the half sum of the three sides subtract each side separately, add together the logarithms of...




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