 | Charles Haslett - 1855 - 544 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 Sinn together, and the square root of the... | |
 | Charles Haynes Haswell - Measurement - 1858 - 350 pages
...contain ? Ans. 74$ yards. To ascertain the area of a Triangle by the length of its Sides (Figs. 6 and 7). RULE. — From half the sum of the three sides subtract each side separately ; then multiply the half sum and the three remainders continually together, and the square root of... | |
 | Henry William Jeans - 1858 - 106 pages
...area. Ans. 80627 square yards. RULE VII. Three sides of a plane triangle being given, to find the area. From half the sum of the three sides, subtract each side separately. Add together the log. of the half sum and the logarithms of the three remainders. Half the result will... | |
 | William Easton (of Hereford.) - 1859 - 110 pages
...divide by 2. When the three sides are given. Rule 2. Find half the sum of the sides. From this half sum, subtract each side separately. Multiply the half sum and the three remainders together, and extract the square rout. The result is the area. Find the area of the following triangles : —... | |
 | Alfred Newsom Niblett - 1861 - 204 pages
...by the perpendicular, and half the product will be the area. CASE 2.—The three sides being given. From half the sum of the three sides subtract each...separately, multiply the half sum and the three remainders continually together, and the square root of the last product will be the area of the triangle. NOTE... | |
 | Janes Boddely Keene - 1861 - 104 pages
...what is its area in square yards ? Ans. 875 one-9th yds. When the Three Sides of a Triangle are given. RULE. — 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... | |
 | Stoddard A. Felter - Arithmetic - 1864 - 412 pages
...; what is the area ? MODEL OPERATION. l.aso. half alt. area. 8ft. X 2 = 16 sq.ft. PROB. II. — The sides of a triangle being given to find the area....of the three sides subtract each side separately, then multiply the continued product of these remainders by half the sum of the sides, and extract the... | |
 | Thomas Baker (C.E.) - 1865 - 174 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,... | |
 | Harris & Brother (Philadelphia) - 1866 - 110 pages
...X by one-half the perpendicular height. 3. TRIANGLE — Area from three sides given. From the half 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. 4. TRAPEZOID — the sum of the two parallel sides... | |
 | Hoy D. Orton - Mathematics - 1866 - 202 pages
...all very brief by canceling. To find Cite 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... | |
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RULE. — From half the sum of the three sides, subtract each side separately; multiply the half -sum and the three remainders together; the square root of the product is the area. 
