| Rufus Putnam - Arithmetic - 1849 - 276 pages
...sides of the field; add them together, and from half their sum subtract each side separately ; then multiply the half sum and the three remainders together ; the square root of this product will be the area. 10. The three sides of a triangular field measure 15, 20 and 25 rods... | |
| John Radford Young - Measurement - 1850 - 294 pages
...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 of the three sides subtract each side severally. Multiply the half sum and the three remainders together, and the square root of the product... | |
| Thomas Baker - Railroads - 1850 - 244 pages
...has been made, and the work must be repeated. TO FIND THE AREA OF A TRIANGLE FROM THE THREE SIDES. RULE. From half the sum of the three sides subtract each side severally and reserve the three remainders; multiply the half sum continually by the three remainders,... | |
| James Elliot - 1851 - 152 pages
...the Three Sides are given. RULE. Add together the three sides, and halve the sum. From the half sum subtract each side separately. Multiply the half sum...remainders together. The square root of the product will be the area. NOTE 1. The first part of the work may be proved, by observing if the sum of the... | |
| 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 product will... | |
| Thomas Kentish - Geometrical drawing - 1852 - 272 pages
...separately; multiply the four remainders together; the square root •will be the area. For the triangle, from half the sum of the three sides subtract each side separately ; multiply the three remainders and the half sum together ; the square root will be the area. gram, and therefore... | |
| 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 product will... | |
| Thomas Kentish - Mathematical instruments - 1854 - 268 pages
...separately; multiply the four remainders together; the square root will be the area. For the triangle, from half the sum of the three sides subtract each side separately; multiply the three remainders and the half sum together ; the square root will be the area. gram, and therefore... | |
| J L. Ellenberger - 1854 - 336 pages
...parallelogram, having the same base and the same altitude. The area of a triangle is also found as follows : From half the sum of the three sides, subtract each side separately, multiply this half sum and the three remainders continually together, and extract the square root of the product,... | |
| Charles Haslett - Engineering - 1855 - 482 pages
...base by a perpendicular let fall from the opposite angle, and take half the product for the area. Or, from half the sum of the three sides subtract each side separately, and multiply the three remainders so obtained and the half sum together, and the square root of the... | |
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