 | 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...remainders together; the square root of the product is the area. 3. Find the area of a triangle whose sides are 25, 36, and 49 in. 4. How many acres in... | |
 | 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... | |
 | Daniel W. Fish - Arithmetic - 1874 - 302 pages
...What is the area of an isosceles triangle whose base is 20 ft., and each of its equal sides 15 feet 1 RULE. — From half the sum of the three sides, subtract each side teparately ; multiply the half -sum and the three remainders together; the square root of the product... | |
 | Horatio Nelson Robinson - Arithmetic - 1875 - 468 pages
...of an isosceles triangle whose base is 20 ft., each of its equal sides 15 ft. ? Ans. 111.85 sq. ft. 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. How many... | |
 | Henry Lewis (M.A.) - Measurement - 1875 - 104 pages
...CASE II. — The area of a triangle may, however, be determined from its three sides by the following 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... | |
| |
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. 
