| Thomas Keith - 1810 - 420 sider
...these four logarithms, is the logarithmical sine of half the angle sought. (H. 215.) OR, RULE III. **From half the sum of the three sides subtract each side separately.** Then add together, The logarithmica! co-secants of half the sum of the sides, and of the difference... | |
| Andrew Mackay - 1811 - 138 sider
...easily measured by the above method. In this case, therefore, the three sides are to be measured. Now **from half the sum of the th'ree sides, subtract each side separately;** then extract the square root of the product of half the sum of the sides by the three differences ;... | |
| Thomas Keith - 1826 - 442 sider
...these four logarithms, is the logarithmical sine of half the angle sought. (F. 184.) OR, RULE III. **From half the sum of the three sides subtract each side separately.** Then add together, The logarithmical co-secants of half the sum of the sides, and of the difference... | |
| Thomas Curtis - 1829
...trigonometry. Рвов. III. To find the area of a triangle, of which the sidei only are given. Rule.—Yrom **half the sum of the three sides, subtract each side separately, and multiply the** half sum and the three remainders continually together; and the square root of the product will be... | |
| Ira Wanzer - 1831 - 396 sider
...in Problem III. 2. When the three sides of the triangle are given, the area may be found as follows: **From half the sum of the three sides subtract each side separately** ; then multiply the said half sum and the three remainders continually together, and the square root... | |
| William Templeton (engineer.) - 1833
...Required the area of a trapezoid whose sides, AB and CD, are 14.5 and 10.25, and breadth, o A, = 7.25. A **PROBLEM III. To find the Area of a Triangle. RULE....angle, and take half the product for the area, — Or,** Subtract each side separately from half the sum of the sides, multiply the half sum of the sides by... | |
| Ireland commissioners of nat. educ - 1834
...feet Gi inches. PROBLEM V. Having the three sides of any Triangle given, to find its orea. RULE I. **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 last product... | |
| 1837 - 262 sider
...feet 6^ inches. PROBLEM V. Having the three sides of any Triangle given, to find its area. RULE I. **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 last product... | |
| Thomas Keith - 1839
...the sum of these four logarithms is the logarithmic sine of half the angle sought (422). RULE III. **From half the sum of the three sides subtract each side separately.** Then add together, mic sines of the difference between the half sum and each side containing the required... | |
| John Hind - 1840 - 224 sider
...Triangle. The area is equal to half the product of the base and the perpendicular altitude. (3) Triangle. **From half the sum of the three sides, subtract each side separately:** multiply together the half-sum and the three remainders, and the square root of the product will be... | |
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