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acres added altitude angle Answer arch base bearing called centre chains chord circle Co-sec Co-sine Co-tang column compasses contained correction decimal degrees difference direct Dist distance divided divisions draw drawn east edge equal EXAMPLE extended feet figure four fourth give given glass greater ground half hand height Hence horizon inches land latitude length less logarithm manner marked measure meridian method minutes multiplied natural object observed opposite parallel perches perpendicular plane PROB proportional Quadrant quotient radius reduce remaining right angles right line root rule scale Secant side sights sine square station subtract Sun's suppose survey taken Tang tangent theo third triangle true whole
Σελίδα 254 - ... that triangles on the same base and between the same parallels are equal...
Σελίδα 239 - RULE. From half the sum of the three sides subtract each side severally.
Σελίδα 49 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.
Σελίδα 14 - Then multiply the second and third terms together, and divide the product by the first term: the quotient will be the fourth term, or answer.
Σελίδα 11 - His method is founded on these three considerations: 1st, that the sum of the logarithms of any two numbers is the logarithm of the product of...
Σελίδα 95 - ... scale. Given the length of the sine, tangent, or secant of any degrees, to find the length of the radius to that sine, tangent, or secant.
Σελίδα 37 - DIVISION BY LOGARITHMS. RULE. From the logarithm of the dividend subtract the logarithm of the divisor, and the number answering to the remainder will be the quotient required.
Σελίδα 32 - Then, because the sum of the logarithms of numbers, gives the logarithm of their product ; and the difference of the logarithms, gives the logarithm of the quotient of the numbers ; from the above two logarithms, and the logarithm of 10, which is 1, we may obtain a great many logarithms, as in the following examples : EXAMPLE 3.