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Βιβλία Βιβλία 1 - 10 από 91 για half the sum of the three sides subtract each side separately. Multiply the half....
" 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. 1. Find the area of a triangle whose sides are 15, 20, 25 feet. "
A Complete Arithmetic: Oral and Written - Σελίδα 217
των Malcolm MacVicar - 1879 - 394 σελίδες
Πλήρης προβολή - Σχετικά με αυτό το βιβλίο

The Operative Mechanic, and British Machinist: Being a Practical ..., Τόμος 1

John Nicholson - 1825 - 795 σελίδες
...three sides only are given : Add the three sides together, and take half the sum ; from the half sum subtract each side separately ; multiply the half sum and the three remainders continually together ; and the square root of the last product will be the area of the triangle. 2)...

The operative mechanic, and British machinist

John Nicholson (civil engineer.) - 1825
...three sides only are given : Add the three sides together, and take half the sum ; from the half sum subtract each side separately ; multiply the half sum and the three remainders continually together ; and the square root of the last product will be the area of the triangle. .Er....

The Youth's Assistant in Theoretick and Practical Arithmetick ...

Zadock Thompson - 1826 - 164 σελίδες
...2.—If the three sides only are given, add these together, and tuke half the sum ; from the half sum subtract each side separately ; multiply the half sum and the three remainders continually together, and the square root of the last product will be the area of the triangle. Examples....

The Builder's Practical Guide: Containing a Complete Explanation of the ...

John Nicholson (civil engineer.) - 1830 - 182 σελίδες
...three sides only are given : Add the three sides together, and take half the sum ; from the half sum subtract each side separately ; multiply the half sum and the three remainders continually together ; and the square root of the last product will be the area of the triangle. 2)...

A practical treatise on the adjustment of the theodolite

Robert Spalding - 1832
...given to find the Area. RULE. Add the three sides together, and take half their sum, from the half sum subtract each side separately, multiply the half sum and the three remainders continually together, and take the square root of the last product for the area of the triangle. EXAMPLE....

The Youth's Assistant in Theorhetic [sic] and Practical Arithmetic: Designed ...

Zadock Thompson - 1832 - 168 σελίδες
...2.—If the three sides only are given, add these togethe? and take half the sum; from the half sum subtract each side separately; multiply the half sum and the three remainders will be the area of the triangle. 1. How many square feet in a triangle, whose base is 40 feet, and...

The Elements of Algebra: Designed for the Use of Students in the University

John Hind - 1837 - 539 σελίδες
...have the area = 1ABx CD = - x - \/ s (s — «)(«— V) (s — c) C 2 •cC From half the sum of the 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. are ^2 a + 2 6 - c, \/2a 2 + 2c 2 -6-, and Ex....

A complete treatise on Practical Land-Surveying, etc

Thomas Holliday - 1838 - 80 σελίδες
...rule, having the three sides given, but very rarely adopted, being too prolix in practice. Rule.—From half the sum of the three sides subtract each side...separately; multiply the half sum and the three remainders continually together, and the square root of the last product will be the area. PROBLEM VII. TO FIND...

A treatise on land surveying [ed.] by W. Galbraith

John Ainslie - 1849
...Rule,—Add the three sides, and take half the sum. From the half sum subtract each side successively, then multiply the half sum and the three remainders together; the square root of the product will be the area of the triangle. In using logarithms, add the logarithm of the half sum and those...

American Common-school Arithmetic ...

Rufus Putnam - 1849
...sides of the field ; add them together, and from half their sum subtract each side separately ; then multiply the half sum and the three remainders together ; the square root of this product will be the area. 10. The three sides of a triangular field measure 15, 20 and 25 rods...




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