| Robert Gibson - Surveying - 1806 - 452 pages
...following problem will be evident. PROBLEM VIII. Three sides of a plane triangle given t0 find the area. **RULE. From half the sum of the three sides subtract each side severally** ; take the logarithms of half the sum and three remainders, anil half their total will be the logarithm... | |
| Peter Nicholson - 1809
...f. i ii PROBLEM III. To find the area of a triangle, whose three sides only are given. From the half **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. EXAMPLE I. Rcquireth the area... | |
| Robert Gibson - Electronic books - 1811 - 508 pages
...following problem will be evident. PROB. nil. The three sides of a filane triangle given to find the area. **RULE. From half the sum of the three sides subtract each side severally** ; take the logarithms of half the sum and three remainders, and half their total will be the logarithm... | |
| Charles Vyse - Arithmetic - 1815 - 320 pages
...let at per acre ? Case 2. When the three sides of a triangle are given, to find the area. i RULE. 3. **From half the sum of the three sides subtract each side severally ; multiply the half** cum and the three remainders continually together, and the square root of the Iast product will be... | |
| Robert Gibson - Surveying - 1818 - 478 pages
...problem will be evident. PROB. VIII. Tlie three sides of a plane triangle given, to find the area. **RULE. From half the sum of the three sides subtract each side severally** ; take the logarithms of the half sum and three remainders, and half their total will be the logarithm... | |
| Peter Nicholson - Mathematics - 1825 - 372 pages
...52 Ofi2.5 Prob. 3. To find the area of a triangle, whose three sides only are given. From the half **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. Едг. Requireth the area... | |
| William Kinne - 1829
...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 square root of the last... | |
| John Bonnycastle - Geometry - 1829 - 252 pages
...102. 5/e. PROBLEM III. To find the area of a triangle whose three sides only are given. RULE.* . 1 . **From half the sum of the three sides subtract each side severally.** * Demon. Let AC— a, ±3=b, uc=c, and AD=a:; (See preceding fig.) Then, since BD=&— x, we shall... | |
| James Hale - Surveying - 1829 - 115 pages
...Perpendicular. RULE 2. If the three Sides of a Triangle be given, its Area may be thus obtained: — **From half the sum of the three Sides, subtract each Side severally,** then extract the Square Root of the continued Product of the half sum and three remainder for the Area.... | |
| Thomas Conkling (W.) - Arithmetic - 1831 - 275 pages
...three lines or sides. PROBLEM3. When the sides of a triangle are given, to find the content. . ' ' . **RULE. From half the sum of the three sides, subtract each side severally;** then, multiply that half sum and the three remainders together; and the sqipre root of the last product... | |
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