| 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...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... | |
| William Vogdes - 1847 - 256 pages
...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...sum and the three remainders continually together,** and the square root of the product will be the area required. EXAMPLES 1. What is the area of a triangle... | |
| Anthony Nesbit - 1847 - 426 pages
...foregoing method. 4. When the three sides of a triangle are given, the area may be found as follows. **From half the sum of the three sides subtract each...sum and the three remainders continually together,** and the square root of the last product will be the area required. This method is too prolix, except... | |
| 1847 - 178 pages
...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,... | |
| 458 pages
...that is, equal to 12 sq. in. PROBLEM III. To find the area of a triangle, whose three sides are 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 the... | |
| Thomas Tate (mathematical master.) - 1848 - 284 pages
...perpendicular 25-25 ft. ? Ans. 68-736. 3. PROBLEM. To find the area of a triangle, given the three sides. **RULE. From half the sum of the three sides subtract...sum and the three remainders continually together,** and the square root of the last product will be the area of the triangle. (See Trigo. Art. 36.) . Note.... | |
| Peter Nicholson, Joseph Gwilt - 1848 - 756 pages
...PROBLEM III. PLATE 50. 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. Required the area... | |
| John Bonnycastle - 1848 - 288 pages
...Ans. 102.5ye. PROBLEM 111. 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=iJ, AB=6, xc—c, and AD=ar/ (See preceding fig.) Then, since uii:=6 — x, we shall... | |
| D. M. Knapen - 1849 - 276 pages
...is 45 rods ? Ans. 5.48 acres. When the sides of H scalene triangle are given, to find its area : — **From half the sum of the three sides subtract each side severally** ; then multiply together the half sum of the three sides, and the three remainders, and extract the... | |
| John Radford Young - 1850 - 294 pages
...the length of that side. Ans. 28-2 yards. PROBLEM IV. — To find the area of a triangle when all its **three sides are given. RULE. — From half the sum...severally. Multiply the half sum and the three remainders** together, and the square root of the product of these four quantities will be the area. The theoretical... | |
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