 | Daniel W. Fish - Arithmetic - 1883 - 364 pages
...area. 2. Find the area of a triangle whose base is 20 ft. and each of the other sides 15 ft. RULE. — From half the sum of the three sides subtract each side separately j multiply the half-sum and the three remainders together; the square root of the product is the area.... | |
 | William Dodds - 1883 - 198 pages
...find the length of the base. 69. To fiiid the area of a triangle when the three are given. RULE. 1°. From half the sum of the three sides subtract each side separately. 2°. Multiply the half sum and the throe remainders continually together. 3°. Take the square root... | |
 | Euclides - 1884 - 434 pages
...I. 41, 35 = Vs (s - a) (s - b) (s - c); which expression may be put into the form of a rule, thus : From half the sum of the three sides, subtract each...the half sum and the three remainders together, and the square root of the product will be the area.* 1. If from B there be drawn BE j_ AC or AC produced,... | |
 | William Waterston - 1884 - 314 pages
...feet : then 4fl X 18 = 810 square feet. 6. The three fides of a triangle being given, toßnd the area: From half the sum of the three sides subtract each...multiply the half sum and the three remainders together; the square root of the product will be the ares. Ex. If the sides be S6, 28, and 30 Inches, we have... | |
 | Colin Arrott R. Browning - 1884 - 274 pages
...2 area He'Sht = T5T(15) When we know the length of each side, but not the perpendicular. Rule : — 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 this product will be the area of triangle. (16) In a right-angled... | |
 | Popular encyclopedia - 1884 - 542 pages
...triangle when the lengths of the sides aro known ; from half the sum of the three sides subtract each aide separately; multiply the half sum and the three remainders together, and extract the »iuare-root of the product Area of any parallelogram = any side multiplied I v the perpendicular distance... | |
 | George Bruce Halsted - Geometry - 1885 - 389 pages
...find the area of a triangle. 319 808. Given, the three sides, to find the area of a triangle. RULE. From half the sum of the three sides subtract each side separately ; multiply together the half -sum and the three remainders. The square root of this product is the area. FORMULA.... | |
 | George Bruce Halsted - Geometry - 1886 - 394 pages
...find the area of a triangle. 319 808. Given, the three sides, to find the area of a triangle. RULE. From half the sum of the three sides subtract each side separately ; mult1ply together the half-sum and the three remainders. The square root of tltis product is the... | |
 | W. V. Wright - Measurement - 1887 - 76 pages
...Divide the circumference by 3.14159. When the three sides of a triangle are given, to find the area : From• half the sum of the three sides subtract each side separately. Multiply the half-sum and the three remainders together, and extract the square root of the product. To find the... | |
 | Christian Brothers - Arithmetic - 1888 - 484 pages
...2? 52 — 39 = 13 52 — 40 = 12 52 x 27 x 13 x 12 = 219024 Area = -v/219024 = 468 sq. yd. 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 continued... | |
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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. 
