| James Elliot - Measurement - 1879 - 118 pages
...the three Sides an given. RULE. Add together the three sides, and halve the gum. 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... | |
| Edward Olney - Arithmetic - 1879 - 404 pages
...either multiplied into the other. 44o. NOTE. — If the three sides only are given, from half the gum of the three sides subtract each side separately, multiply the half sum and these remainders together, and extract the square root of the product. The pupil cannot see why this... | |
| Moffatt and Paige - 1879 - 506 pages
...sides are given. Rule. — Add the three sides together and take half the sum ; from this half sum subtract each side separately ; multiply the half sum and the three remainders together, and take the square root of the last product for the area. If the sides be denoted by a, b, c, and... | |
| Edward Olney - Arithmetic - 1879 - 392 pages
...altitude, or half of either multiplied into the oiher. 446. NOTE. — If the three sides only are given, from half the sum of the three sides subtract each side separately, multiply Hie half sum and these remainders together, and extract the square root of the product. The pupil cannot... | |
| Samuel Mecutchen - Arithmetic - 1880 - 292 pages
...supply the deficiency with ciphers. RULES IN MENSURATI0N. SURFACES. To find the area of a triangle. FROM half the sum of the three sides, subtract each...multiply the half sum and the three remainders together, and the square root of the product will be the area required. NOTE. — When the base and altitude... | |
| Samuel Mecutchen - Arithmetic - 1880 - 262 pages
...supply the deficiency with ciphers. RULES IN MENSURATION. SURFACES. To find the area of a triangle. FROM half the sum of the three sides, subtract each...multiply the half sum and the three remainders together, and the square root of the product will be the area required. NOTE. — When the base and altitude... | |
| Edward Olney - Arithmetic - 1880 - 236 pages
...\ / \^ A f gether, as B and A'. Then the two make 446. NOTE. — If the three sides only are given, from half the sum of the three sides subtract each side separately, multiply the half sum and these remainders together, and extract the square root of the product. The pupil cannot see why this... | |
| Thomas Liddell Ainsley - 1880 - 866 pages
...The area of a triangle may, however, be determined from its three sides by the following EULE LXV. 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 latí product... | |
| Popular educator - 1880 - 926 pages
...calculation of the area of a triangle without finding its perpendicular, the three sides being given :— From half the sum of the three sides subtract each side separately. Then multiply the half sum by the three remainders successively, and the square root of the product... | |
| George Bruce Halsted - Measurement - 1881 - 266 pages
...= 113-581 square meters. Ans. J b 36, Given the three sides of a triangle, to find the area. Eule : From half the sum of the three sides subtract each...remainders together : the square root of the product will be the area. Formula : A = Vs (s — a) (s — 6) (s — c]. Proof: By 4, a* = Z>* + c'-2fy-,... | |
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