Books Books
... and 48° 15'? Ans. 6 A. 3 R. 18 P. PROBLEM V. To find the area of a triangle when the three sides are given. RULE. From half the sum of the three sides...
A Treatise on Surveying and Civil Engineering, Wherein Everything that is ... - Page 7
by P. O'Shaughnessy (Civil engineer) - 1848 - 98 pages

## A Textbook on Sheet-metal Pattern Drafting, Volume 1

International Correspondence Schools - 1901 - 570 pages
...63. When the three sides of • • a triangle are given, its area is found by the following rule: Rule. — From half the sum of the three sides, subtract each side separately; find the continued product of the half sum of the sides and thc three remainders; the square...

## The Business Man's Arithmetic: Containing an Application of a Natural ...

James Sherman Hunter - 1902 - 426 pages
...problems are all very brief by canceling. To find the area of any triangle when the three sidtt 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 ; then the square root of the last...

## The Mechanical Engineer's Pocket-book: A Reference Book of Rules, Tables ...

William Kent - 1907 - 1206 pages
...altitude. RULE 2. Multiply half the product of two sides by the sine of the Included angle. RULES. From half the sum of the three sides subtract each side severally; multiply together the half sum and the three remainders, and extract the square root of the product. The area...

## Modern Sheet-metal Workers' Instructor: Practical Geometry, Mensuration ...

Joseph H. Rose - 1906 - 340 pages
...C Sum of sides To find the area of any oblique angled triangle when only the three sides are given. From half the sum of the three sides, subtract each...severally. Multiply the half sum and the three remainders together and the square root of the product is equal to the area required. Area=i/S(S— A) (8— B)...

## Practical Mechanical Drawing and Machine Design, Self Taught ...

Charles Westinghouse - 1906 - 168 pages
...(SC) Sum of sides To find the area of any oblique angled triangle when only the three sides are given. From half the sum of the three sides, subtract each...severally. Multiply the half sum and the three remainders together and the square root of the products is equal to the area required. Area=i/S(S— A) (8—...

## Geometry: Plane Trigonometry. Chain Surveying. Compass Surveying. Transit ...

International Correspondence Schools - 1906 - 620 pages
...vertex. 47. To find the area of a triangle from the lengths of its three sides, apply the following: Rule. — From half the sum of the three sides subtract each side separately; multiply together the half sum and the three remainders and extract the square root of...

## The Art of Railroading: Or, The Technique of Modern Transportation, Volume 6

Calvin Franklin Swingle, Frederick John Prior - 1906 - 676 pages
...height of any oblique angled triangle— Fig. 61. From half the sum of the three sides of the triangle, subtract each side severally. Multiply the half sum and the three remainders together and twice the square root of the result divided by the base of the triangle be the height...

## Kimball's Commercial Arithmetic: Prepared for Use in Normal, Commercial and ...

Gustavus Sylvester Kimball - 1911 - 444 pages
...feet. Solution. (20+30+40) -5-2 =45; 45-20 = 25; 45-30 = 15; 45-40 = 5. ^45X25X15X5 = 290.4 + ft. 357. Rule. From half the sum of the three sides, subtract each side separately. Multiply the half sum and the three remainders together, and extract the square root of...