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 ## The popular educator, Volumes 5-6

Popular educator - 1880 - 926 pages
...the calculation of the area of a triangle without finding its perpendicular, the three sides being given :— From half the sum of the three sides subtract each side separately. Then multiply the half sum by the three remainders successively, and the square root of the product... ## The engineers' manual of the Local marine examinations

Thomas Liddell Ainsley - 1880 - 866 pages
...The area of a triangle may, however, be determined from its three sides by the following EULE LXV. 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 latí product... ## Graded Problems in Arithmetic and Mensuration

Samuel Mecutchen - Arithmetic - 1880 - 244 pages
...supply the deficiency with ciphers. RULES IN MENSURATI0N. SURFACES. To find the area of a triangle. 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... ## The Progressive Higher Arithmetic: For Schools, Academies, and Mercantile ...

Horatio Nelson Robinson - Arithmetic - 1875 - 470 pages
...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.... ## Graded Problems in Arithmetic and Mensuration

Samuel Mecutchen - Arithmetic - 1880 - 262 pages
...supply the deficiency with ciphers. RULES IN MENSURATION. SURFACES. To find the area of a triangle. 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... ## Metrical Geometry: An Elementary Treatise on Mensuration

George Bruce Halsted - Measurement - 1881 - 266 pages
...= 113-581 square meters. Ans. J b 36, Given the three sides of a triangle, to find the area. Eule : 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 will be the... ## Arithmetic. [With] Key

Montagu H. Foster - 1881 - 182 pages
...2. Triangle. The area equals half the product of the %ase and perpendicular altitude. 3. Triaiigle. From half the sum of the three sides subtract each side separately, multiply the half sum by these three remainders, and extract the square root of the product. 4. Trapezium.... ## Complete Graded Arithmetic, Oral and Written: Upon the Inductive Method of ...

James Bates Thomson - Arithmetic - 1882 - 414 pages
...ft. wide, and 12£ ft. from the beam to the ridgepole. 810. To find the Area of a Triangle, when the Three Sides are given. From half the sum of the three sides subtract each side respectively ; then multiply half the sum and the three remainders together, and extract the square... ## Mensuration for beginners [With] Answers

William Dodds - 1883 - 202 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... 