Books Books RULE. from half the sum of the three sides, subtract each side separately; multiply the half sum and the three remainders together, and the square root of the product will be the area required. Higher Book - Page 252
by William Seneca Sutton - 1896 ## A Treatise on a Box of Instruments and the Slide-rule: For the Use of ...

Thomas Kentish - Geometrical drawing - 1852 - 272 pages
...separately; multiply the four remainders together; the square root •will be the area. For the triangle, from half the sum of the three sides subtract each side separately ; multiply the three remainders and the half sum together ; the square root will be the area. gram,... ## A Theoretical and Practical Arithmetic: Designed for Common Schools and ...

Daniel Leach - Arithmetic - 1853 - 626 pages
...triangle ? 364. To find the area of a^ triangle, when the length of its three sides is known, — RULE. From half the sum of the three sides subtract each side separately. Then multiply the half sum by each side in succession. The square root of the continued product will... ## The course of arithmetic as taught in the Pestalozzian school, Worksop ...

J L. Ellenberger - 1854 - 344 pages
...parallelogram, having the same base and the same altitude. The area of a triangle is also found as follows : From half the sum of the three sides, subtract each side separately, multiply this half sum and the three remainders continually together, and extract the square root of... ## A Treatise on a Vox of Instruments and the Slide-rule: For the Use of ...

Thomas Kentish - 1854 - 270 pages
...separately; multiply the four remainders together; the square root will be the area. For the triangle, from half the sum of the three sides subtract each side separately; multiply the three remainders and the half sum together ; the square root will be the area. gram, and... ## The Mechanic's, Machinist's, and Engineer's Practical Book of Reference ...

Charles William Hackley - Engineering - 1855 - 482 pages
...base by a perpendicular let fall from the opposite angle, and take half the product for the area. Or, from half the sum of the three sides subtract each side separately, and multiply the three remainders so obtained and the half sum together, and the square root of the... ## The Mechanic's, Machinist's, and Engineer's Practical Book of Reference ...

Charles Haslett - 1855 - 544 pages
...base by a perpendicular let fall from the opposite angle, and take half "the product for the area. Or, from half the sum of the three sides subtract each side separately, and multiply the three remainders so obtained and the half Sinn together, and the square root of the... ## Plane and spherical trigonometry. [With] Solutions of problems

Henry William Jeans - 1858 - 106 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... ## Mensuration and Practical Geometry: Containing Tables of Weights and ...

Charles Haynes Haswell - Measurement - 1858 - 350 pages
...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 root of... ## The Artillerists̓ Manual, and British Soldiers̓ Compendium

Frederick Augustus Griffiths - Artillery - 1859 - 426 pages
...20 yards, and perpendicular height 14 yards. 20 x 14 — - — = 140 square yards. Area required. 2 To find the area of a triangle, whose three sides...half the sum of the three sides, subtract each side severally; multiply the half sum, and the three remainders together, and the square root of the product... 