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" 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 ... - Page 92
by John Gummere - 1817 - 206 pages
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A Treatise on Practical Gauging

Anthony Nesbit, W. Little - 1822 - 916 pages
...2150.42 =; 2.758, the area in malt bushels ; then 2.758 X 42.3 = 1 1 6.66S4, the content in malt bushels. PROBLEM V. To find the area of a triangle, when the three sidet are given. EXAM. 3. Here 114+ 112 + gg _ 162, half the sum of the sides; then 168 - H4 = 48,...
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A Treatise on Practical Mensuration in Eight Parts ...

Anthony Nesbit - 1824 - 476 pages
...rood ? Ans. £6 4*. 7 \d. , PROBLEM V. To find the area of a triangle, the three sides only of which are given. 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...
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A Short System of Practical Arithmetic: Compiled from the Best Authorities ...

William Kinne - 1829 - 246 pages
...the corner a true right-angle. RULE 2. — To find the area of any triangle when the three sides only are given, RULE. — From half the sum of the three sides' subtract each side severally ; multiply these three remainders and the said half sum continually together; then the...
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The American Student's Guide: Containing a Compendious System of Theoretical ...

George Alfred - 1834 - 336 pages
...the perpendicular CD Э6 ; what is the area in acres, &c. ? ADS. 14 acres 2 roods 32 poks PROBLEM 7. To find the area of a triangle when the three sides...From half the sum of the three sides subtract each side several! y, then multiply the half sum and the three remainders continually together, and the...
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First Lessons in Geometry: With Practical Applications in Mensuration, and ...

Charles Davies - 1840 - 264 pages
...triangle whose base is 72,7 yards, and altitude 36,5 yards 1 Ans. 1326,775 sq. yds. PROBLEM III. 10. To find the area of a triangle when the three sides are known. RULE. 1st. Add the three sides together and take half their sum. Mensuration of Surt'acfs. 2nd....
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Watson's Tutor's assistant; or, Complete school arithmetic

William Watson (of Beverley.) - 1845 - 188 pages
...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 the three sides, subtract each side severally, multiply the lialf sum, and the three • These, and the following, should be laid...
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Elements of Drawing and Mensuration Applied to the Mechanic Arts: A Book for ...

Charles Davies - 1846 - 254 pages
...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....
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A Complete Treatise on Practical Land-surveying: In All Its Departments ...

Anthony Nesbit - 1847 - 492 pages
...= 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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A Treatise on Surveying and Civil Engineering, Wherein Everything that is ...

P. O'Shaughnessy (Civil engineer) - 1848 - 110 pages
...triangle whose three sides measure 20. 41, 24. 16, and 30. 12 chains. Ans. 24* 2r OP. Second Limma to find the area of a triangle when the three sides are given. Square the sum of any two sides, take the square of the third side from it ; take the diffc. of the...
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A treatise on land surveying [ed.] by W. Galbraith

John Ainslie - 1849 - 586 pages
...and contained angle, or two angles and adjacent side of triangles, are given to find the area. 1 . To find the area of a triangle when the three sides are given. Rule. — Add the three sides, and take half the sum. From the half sum subtract each side successively,...
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