Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Books Books
" 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. "
Mensuration for Beginners: With Numerous Examples - Page 74
by Isaac Todhunter - 1869 - 296 pages
Full view - About this book

Metrical Geometry: An Elementary Treatise on Mensuration

George Bruce Halsted - Measurement - 1881 - 258 pages
...Given the three sides of a triangle, to find the area. Eule ; From half the sum of the three sidles subtract each side separately; multiply the half sum...remainders together : the square root of the product will be the area. Formula : A — Vs (s — a) (s — b) (s — c). Proof: By 4, whence By 2, „ 2...
Full view - About this book

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. The area equals...
Full view - About this book

Practical arithmetic for schools

Robert Miller (M.A., of Edinburgh.) - Arithmetic - 1881 - 238 pages
...Area = base x perpendicular height. TRIANGLE: Area = a8e * p- — -, or from half the sum of the 4 three sides subtract each side separately. Multiply the half sum and the three remainders together, and take the square root of the product. SPHERE: Area=D" x 3-1416; solid contents = TI» x -5236 ;...
Full view - About this book

Fish's Arithmetic Number One[-two]: Oral and Written ..., Volume 2

Daniel W. Fish - Arithmetic - 1883 - 348 pages
...6OO ft., 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...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...
Full view - About this book

Fish's Arithmetic Number Two: Oral and Written, Upon the Inductive ..., Book 2

Daniel W. Fish - Arithmetic - 1883 - 364 pages
...COO ft., 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....
Full view - About this book

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...
Full view - About this book

A manual of commerce

William Waterston - 1884 - 298 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...remainders together; the square root of the product will be the ares. Ex. If the sides be S6, 28, and 30 Inches, we have 26 + 28 + 30 = 84, and ft 84 =42;...
Full view - About this book

The Elements of Euclid, books i. to vi., with deductions, appendices and ...

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...multiply 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,...
Full view - About this book

The Weston school manual

Colin Arrott R. Browning - 1884 - 274 pages
...heightTT . , - 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...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...
Full view - About this book

The Elements of Geometry

George Bruce Halsted - Geometry - 1885 - 389 pages
...vertex, to 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....
Full view - About this book




  1. My library
  2. Help
  3. Advanced Book Search
  4. Download EPUB
  5. Download PDF