RULE. from half the sum of the three sides, subtract each side separately; multiply the half sum and the three remainders together, and the square root of the product will be the area required. Higher Book - Page 252by William Seneca Sutton - 1896Full view - About this book
| Thomas Keith - Navigation - 1810 - 478 pages
...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 - Mathematical instruments - 1811 - 162 pages
...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 - Navigation - 1826 - 504 pages
...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... | |
| John Gummere - Surveying - 1828 - 404 pages
...angles 37° 30' and.48°15'? Ans. 6 A. 3R. 18 P. PROBLEM V. To find the. area of a triangle when the **three sides 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... | |
| Ira Wanzer - Arithmetic - 1831 - 408 pages
...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... | |
| Ireland commissioners of nat. educ - 1834 - 370 pages
...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... | |
| John Radford Young - Geometry, Analytic - 1835 - 298 pages
...formula for S, and reducing, we finally obtain S= V (pp — «-p — bp — c). From this we see that **to find the area of a triangle whose three sides are given,** we must find the half-sum of the three sides, subtract from the half-sum successively each of the three... | |
| Commissioners of National Education in Ireland - Measurement - 1837 - 284 pages
...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 - 498 pages
...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... | |
| Frederick Augustus Griffiths - 1840 - 436 pages
...whose base is 20 yards, and perpendicular height 14 yards. .?i__ =140 Square yards. Area required. **To find the Area of a Triangle, whose three Sides...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... | |
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