 | Daniel Leach - Arithmetic - 1851 - 280 pages
...is 80 yards ? 364. To find the area of a triangle, when the length of its three sides is known,— RULE. From half the sum of the three sides subtract each side separately. Then multiply the half sum by each side in succession. The square root of the continued... | |
 | Oliver Byrne - Engineering - 1851 - 310 pages
...A " " 7 J 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 side severally. Multiply the half sum and the three remainders continually together, and the square root of the product... | |
 | Daniel Leach - Arithmetic - 1853 - 622 pages
...a triangle ? 364. To find the area of a^ triangle, when the length of its three sides is known, — RULE. From half the sum of the three sides subtract each side separately. Then multiply the half sum by each side in succession. The square root of the continued... | |
 | Elias Loomis - Trigonometry - 1855 - 192 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 remainders, and extract the square root of the product.... | |
 | William Templeton (engineer.) - 1855 - 326 pages
...feet, the area. 2 When only the three sides of a triangle can t>e given, to find the area. Mule. — 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 is equal... | |
 | Mechanical engineering - 1855 - 420 pages
...superficies. ; = 206-34375 square feet, the area. When only the three sides of a triangle can be given tn find the area. Rule. — 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 th* product is equal... | |
 | David Price - Arithmetic - 1858 - 264 pages
...? Ans. 9 acres 2 roods. VI. To find ike area of a triangle whose three sides are given. RULE 1. — From half the sum of the three sides, subtract each side severally. 2. — Multiply the three remainders and half the sum of the three sides together. 3. — The square... | |
 | Charles Haynes Haswell - Measurement - 1858 - 350 pages
...contain ? Ans. 74$ yards. To ascertain the area of a Triangle by the length of its Sides (Figs. 6 and 7). RULE. — From half the sum of the three sides subtract each side separately ; then multiply the half sum and the three remainders continually together, and the square... | |
 | Elias Loomis - Logarithms - 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.... | |
 | Frederick Augustus Griffiths - Artillery - 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 side severally; multiply the half sum, and the three remainders together, and the square root of the product will be... | |
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RULE. From half the sum of the three sides subtract each side severally. 
