 | Alfred Hiley - 1871 - 184 pages
...the height, and divide the product by 2. (2) To find the area, when the three sides are given. Prom half the sum of the three sides, subtract each side...the half sum and the three remainders together, and the square root of the product is the area. THE TRIANGLE. Kg. 3. sion are given. — (a) Divide double... | |
 | Charles Davies - Leveling - 1871 - 448 pages
...add them together and take half their sum. From this half sum subtract each side separately. Then, multiply the half sum and the three remainders together, and extract the square root of the product : the result will be the area (Geom. Mens., Art. 97). Or, after having obtained the three remainders,... | |
 | Hoy D. Orton - Ready-reckoners - 1871 - 202 pages
...the corner a true right-angle. To find the area of any triangle when the three tides 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 ; 'hen the square... | |
 | John Groesbeck - 1872 - 374 pages
...length by the breadth. To find the area of a triangle. Multiply the base by one-half the altitude. Or, From half the sum of the three sides subtract each side separately ; multiply together the half sum and the three remainders, and extract the tquare root of the product. To find... | |
 | Henry William Jeans - 1873 - 292 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... | |
 | Daniel W. Fish - Arithmetic - 1874 - 526 pages
...What is the area of an isosceles triangle whose base is 20 ft., and each of its equal sides 15 feet ? RULE. — From half the sum of the three sides, subtract...multiply the half -sum and the three remainders together; the square root of the product is the area. 3. Find the area of a triangle whose sides are 25, 36,... | |
 | Daniel W. Fish - Arithmetic - 1874 - 298 pages
...What is the area of an isosceles triangle whose base is 20 ft., and each of its equal sides 15 feet ? RULE. — From half the sum of the three sides, subtract each side separately; multiply the half -turn and the three remainders together; the square root of the product is the area. 3. Find the area... | |
 | Daniel W. Fish - Arithmetic - 1874 - 298 pages
...area of an isosceles triangle whose base is 20 ft., and each of its equal sides 15 feet ? EULE. — From half the sum of the three sides, subtract each side separately ; multiply the half -turn and the three remainders together; the square root of the product is the area. 3. Find the area... | |
 | Daniel W. Fish - Arithmetic - 1874 - 300 pages
...What is the area of an isosceles triangle whose base is 20 ft., and each of its equal sides 15 feet ? RULE. — From half the sum of the three sides, subtract each side separately ; multiply the half-surn ami the three remainders together; the square root of the product is the area. 3. Find the... | |
 | Daniel W. Fish - Arithmetic - 1874 - 540 pages
...area of an isosceles triangle whose base is 20 ft., and each of its equal sides 15 feet? 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. 3. Find 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. 
