 | Henry James Castle - 1856 - 220 pages
...2-3375 acres. multiply by the sq. yards in 1 acre =. 4840 area = H 3 1 3 -5 sq. yards. PEOBLEM II. To find the area of a triangle, when the three sides are given. Rule. Take half the sum of the three sides, subtract each side severally from this sum ; then multiply this... | |
 | 1855 - 420 pages
...206-34375 square feet, the area. When only the three sides of a triangle can be given tn find the area. Rule. — From half the sum of the three sides subtract...severally ; multiply the half sum and the three remainders together, and the square root of th* product is equal the area required. Required the area of a triangle,... | |
 | Horace Mann, Pliny Earle Chase - 1857 - 388 pages
...cone, frustum, &c.) ; ub the upper base. 1. THE PARALLELOGRAM, a — bx al. 2. THE TRIANGLE, a = lL?-. To find the area of a triangle, when the three sides are given : I. Add the three sides together, and take half their sum. II. From this half sum take each side separately.... | |
 | Horace Mann, Pliny Earle Chase, Phiny Earie Chase - 1857 - 394 pages
...cone, frustum, &c.) ; ub the upper base. 1. THE PARALLELOGRAM, a = bx al. 2. THE TRIANGLE, a = 1JL?L To find the area of a triangle, when the three sides are given : I. Add the three sides together, and take half their sum. II. From this half sum take each side separately.... | |
 | James Bates Thomson - 1858 - 400 pages
...sq. ft. 11. What is the area of a triangle whose base is 156 feet, aud its altitude 63 (bet? 431 > To find the area of a triangle, when the three sides are ¿iven. From half the sum of the three sides subtract each side respectively ; then multiply together... | |
 | Charles Haynes Haswell - 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... | |
 | David Price - 1858 - 264 pages
...? Ans. 9 acres 2 roods. VI. To find ike area of a triangle whose three sides are given. RULE 1. — From half the sum of the three sides, subtract each side severally. 2. — Multiply the three remainders and half the sum of the three sides together. 3. — The square... | |
 | Anthony Nesbit - 1859 - 494 pages
...rood ? Ans. £6. 4s. 7%d. PROBLEM V. To find the area of a triangle, the three sides only of which are given. RULE. From half the sum of the three sides...severally ; 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, c 4... | |
 | Frederick Augustus Griffiths - 1859 - 426 pages
...— = 140 square yards. Area required. 2 To find the area of a triangle, whose three sides are given. From half the sum of the three sides, subtract each...severally; multiply the half sum, and the three remainders together, and the square root of the product will be the area required. Example. — Required the area... | |
 | Elias Loomis - 1859 - 372 pages
...feet, and the included angle 67° 15' ? Ans. (85.) When the three sides are known, we may use RULE III. From half the sum of the three sides subtract each side severally ; multiply together the half sum and the three remain* ders, and extract the square root of the product. Demonstration.... | |
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To find the Area of a Triangle when the Three Sides are given. Rule. — From half the sum of the three sides subtract each side separately. 
