 | 1801 - 658 σελίδες
...perimeter is three times the side, and the three differences are all equal to each other. , • RULE 3. Any two sides of a triangle being multiplied together, and the product again by half the natural sine of their in. eluded' angle, wifl give the area of the triangle. DEMONSTRATION. This follows from Rule... | |
 | Samuel Webber - 1808 - 466 σελίδες
...three times the side, and the three differences are all equal to each other. RULE 3. Any two fides of a triangle being multiplied together, and the product again by half the natural sine of their included angle, will give the area of the triangle. DEM0NSTRATI0N. 6-25 5-20 12500 3125 2)32-5000... | |
 | John Bonnycastle - 1829 - 256 σελίδες
...angled, a being the hypothenuse, the rule will be a+6+£x 4 J)X £p — a, putting p for the perimeter. RULE II. Any two sides of a triangle being multiplied...together, and the product again by half the natural sine of their included angle, will give the area of the triangle. Also 54—24=30 first diff. 54 — 36=18... | |
 | John Bonnycastle - 1833 - 310 σελίδες
...— a+b+c hypothenuse, the rule will be _ — X 1 _ , 01 pxip — a, putting p for the perimeter. . RULE II. Any two sides of a triangle being multiplied...and '• the product again by half the natural sine of their included angle, wiH give the area of the triangle. That is, AC X CB X nat. sine of the angle... | |
 | John Bonnycastle - 1848 - 320 σελίδες
...hypothenuse, the rule will be a + b+cx~a+b+c, or 1 p XA ji — «, putting p for the perimeter. RUJ.E II. Any two sides of a triangle being multiplied together, and the product again by half the natural sine of their included angle, will (five the area of the triangle. That is, AC X rB X nat. sine of the angle... | |
 | William Miller Barr - 1918 - 650 σελίδες
...remainders continually together, and the square root of the product will be the area required. Rule 2. Any two sides of a triangle being multiplied together and the product again by half the natural sine of their included angle will give the area of the triangle. That is, AC multiplied by CB X natural... | |
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RULE II. Any two sides of a triangle being multiplied together, and the product again by half the natural sine of their included angle, will give the area of the triangle. 