ログイン
 書籍 To find the Area of a Triangle when the Three Sides are given. Rule. — From half... の書籍検索結果
To find the Area of a Triangle when the Three Sides are given. Rule. — From half the sum of the three sides subtract each side separately.
A Treatise on Surveying, Containing the Theory and Practice: To which is ... - 97 ページ
John Gummere 著 - 1814 - 346 ページ

## The Complete Arithmetic: Oral and Written, 第 1 巻

Daniel W. Fish - 1874 - 516 ページ
...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...

## The Complete Arithmetic, Oral and Written: Second Part

Daniel W. Fish - 1874 - 272 ページ
...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...

## A Practical Business Arithmetic ...

Lorenzo Fairbanks - 1875
...chains, and the perpendicular 18.25 chains ? PROBLEM III. 710. To find the area of a triangle when three sides are given. 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...

## Plane and Spherical Trigonometry and Mensuration

Aaron Schuyler - 1875 - 184 ページ
...respectively, and their included angle is 85° 40' 20''; what is the area. Ans. 428470. 102. Problem. To find the area of a triangle when the three sides are given. By the last problem we find (1) k = £ be sin A, (2) sin A = 2 sin \ A cos \ A. Article 95, (5). (3)...

## Mensuration for elementary and middle class schools

Henry Lewis (M.A.) - 1875 - 85 ページ
...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...

## The Progressive Higher Arithmetic: For Schools, Academies, and Mercantile ...

Horatio Nelson Robinson - 1875 - 456 ページ
...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...

## Elements of Plane and Solid Geometry

George Albert Wentworth - 1877 - 398 ページ
...figure. § 424 GEOMETRY. — BOOK V. EXERCISES. 1. The area of any triangle may be found as follows : 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. Denote...

## Complete Arithmetic: Comprising the New Intermediate Arithmetic and Part of ...

Stoddard A. Felter, Samuel Ashbel Farrand - 1877 - 471 ページ
...2d remainder. 27 — 24 = 3, 3d remainder. 27 X 15 X 9 X 3 = 10935. y 10935 = 104.57 sq. rds. area. RULE. — From half the sum of the three sides subtract each side separately ; then multiply the continued product of these remainders by half the sum of the sides,...

## The New American Arithmetic, 第 3 部

...preceding right triangle, AB is the hypotenuse, and AC, the perpendicular. To find the area of a triangle. 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...

## The Practical Arithmetic on the Inductive Plan: Including Oral and Written ...

William James Milne - 1877 - 391 ページ
...the product of the base by the altitude. When the three sides are given, the following is the rule: 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...