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" ... and 48 15'? Ans. 6 A. 3 R. 18 P. PROBLEM V. To find the area of a triangle when the three sides are given. RULE. From half the sum of the three sides... "
A Treatise on Surveying and Civil Engineering, Wherein Everything that is ... - Page 7
by P. O'Shaughnessy (Civil engineer) - 1848 - 98 pages
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The Artillerists̓ Manual, and British Soldiers̓ Compendium

Frederick Augustus Griffiths - 1859 - 426 pages
...— = 140 square yards. Area required. 2 To find the area of a triangle, whose three sides are given. From half the sum of the three sides, subtract each...severally; multiply the half sum, and the three remainders together, and the square root of the product will be the area required. Example. — Required the area...
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Tables of Logarithms of Numbers and of Sines and Tangents for Every Ten ...

Elias Loomis - 1859 - 372 pages
...feet, and the included angle 67 15' ? Ans. (85.) When the three sides are known, we may use RULE III. From half the sum of the three sides subtract each side severally ; multiply together the half sum and the three remain* ders, and extract the square root of the product. Demonstration....
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The artillerist's manual, and compendium of infantry exercise

Frederick Augustus Griffiths - 1859 - 422 pages
...To find the area of a triangle, whose three sides are given. From half the sum of the three side?, 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. Example. — Required the area...
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A handbook of practical gauging

Janes Boddely Keene - 1861 - 104 pages
...feet ; what is its area in square yards ? Ans. 875 one-9th yds. When the Three Sides of a Triangle are given. RULE. — From half the sum of the three sides subtract each side separately ; then multiply the half sum and the three remainders together, and the square root of the...
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Adams's Improved Arithmetic: Arithmetic, in which are Combined the Analytic ...

Daniel Adams - 1861 - 454 pages
...the other ? Ans. 131 feet. To find the area of a triangle when the length of each side is given, — From half the sum of the three sides subtract each side severally ; then multiply the half sum and the three remainders continually together, and the square root of...
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The young gardener's educator

William Keane (gardener.) - 1861 - 252 pages
...field is by measuring the three sides separately. The rule for finding the content by the pen is : From half the sum of the three sides, subtract each side severally, then multiply the half sum and the three remainders together, and the square root of the last product...
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The Practical Model Calculator, for the Engineer, Mechanic, Machinist ...

Oliver Byrne - 1863 - 600 pages
...A " " 7J pa. = area required. To find the area of a triangle whose three sides only are given. — From half the sum of the three sides subtract each...sum and the three remainders continually together, and the square root of the product will be the area required Required the area of the triangle ABC,...
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The Analysis of Written Arithmetic: Book Second, Designed for Public and ...

Stoddard A. Felter - 1864 - 412 pages
...alt. area. 8ft. X 2 = 16 sq.ft. PROB. II. — The sides of a triangle being given to find the area. RULE. — From half the sum of the three sides subtract each side separately, then multiply the continued product of these remainders by half the sum of the sides, and...
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Rudimentary treatise on mensuration and measuring

Thomas Baker (C.E.) - 1865 - 172 pages
...has been made, and the work must be repeated. TO FIND THE AREA OF A TRIANGLE FROM THE THREE SIDES. RULE. — From half the sum of the three sides subtract each side severally and reserve the three remainders ; multiply the half sum continually by the three remainders, and the...
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Orton's Lightning Calculator, and Accountant's Assistant: The Shortest ...

Hoy D. Orton - 1866 - 202 pages
...problems are all very brief by canceling. To find Cite 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 square root of the...
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