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RULE. From half the sum of the three sides subtract each side severally.
The Theory and Practice of Surveying: Containing All the Instructions ... - Σελίδα 229
των Robert Gibson - 1821 - 544 σελίδες
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## A Treatise of Practical Surveying: Which is Demonstrated from Its First ...

Robert Gibson - 1806 - 452 σελίδες
...following problem will be evident. PROBLEM VIII. Three sides of a plane triangle given t0 find the area. RULE. From half the sum of the three sides subtract...the logarithms of half the sum and three remainders, anil half their total will be the logarithm of the area : or, take the square root of the continued...

## The Tutor's Guide: Being a Complete System of Arithmetic; with Various ...

Charles Vyse - 1806 - 320 σελίδες
...let at per Acre ? Case 2. When the three Sides of a Triangle are given, to find the Area. RULE. 3. From Half the Sum of the three Sides subtract each Side severally ; multiply the Half Sum and the three Remainders continually together, and the Square Root of the last...

## A Treatise of Practical Surveying, ...

Robert Gibson - 1808 - 440 σελίδες
...From half the sum of the three sides subtratl eack side severally ; take the logarithms of the half sum and three remainders, and half their total will...the square root of the continued product of the half sum and three remainders for the area. EXAMPLE s. Plate VIII. fig. 9. 1. In the triangle ABC, are....

## The Theory and Practice of Surveying: Containing All the Instructions ...

Robert Gibson - 1814 - 508 σελίδες
...a filant Mangle given to Jlnd the areq. RULE. From half the sum of the three sides subtract •ach side severally ; take the logarithms of half the sum...the square root of the continued product of the half sum and three remainders for the area. . EXAMPLES. Pi. S.jg. 9. 1. In the triangle ABC, ate = 10.64...

## A Treatise on Surveying, Containing the Theory and Practice: To which is ...

John Gummere - 1814 - 346 σελίδες
...48° 15'? Ans. 6A. 3R. 18P. PROBLE 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 severally ; multiply the half sum and the three remainders contiuually together, and the square root of the last...

## The Tutor's Guide: Being a Complete System of Arithmetic; with Various ...

Charles Vyse - 1815 - 320 σελίδες
...let at per acre ? Case 2. When the three sides of a triangle are given, to find the area. i RULE. 3. From half the sum of the three sides subtract each side severally ; multiply the half cum and the three remainders continually together, and the square root of the Iast...

## A Treatise on Practical Surveying: Which is Demonstrated from Its First ...

Robert Gibson - 1818 - 478 σελίδες
...problem will be evident. PROB. VIII. Tlie three sides of a plane triangle given, to find the area. RULE. From half the sum of the three sides subtract each side severally ; take the logarithms of the half sum and three remainders, and half their total will be the logarithm of the area : or take...

## A Treatise on Practical Mensuration in Eight Parts ...

Anthony Nesbit - 1824 - 434 σελίδες
...£6 4*. 7 \d. , PROBLEM V. To find the area of a triangle, the three sides only of which are given. RULE. From half the sum of the three sides subtract each side severally ; multiply the half sum and the three remainders continually together; and the square root of the last...

## A Treatise on Surveying: Containing the Theory and Practice: to which is ...

John Gummere - 1828 - 216 σελίδες
...and.48°15'? Ans. 6 A. 3R. 18 P. PROBLEM V. To find the. area of a triangle when the three sides are given. From half the sum of the three sides subtract each side severally; multiply the half sum and the three remainders continually together, and the square root of the last...

## A Short System of Practical Arithmetic: Compiled from the Best Authorities ...

William Kinne - 1829
...true right-angle. RULE 2. — To find the area of any triangle when the three sides 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...