A Complete Treatise on Practical Mathematics: Including the Nature and Use of Mathematical Instruments: Logarithmic Tables, Trigonometry, Mensuration of Heights and Distances,--of Surfaces & Solids, Land Surveying, Gunnery, Gauging, Artificer's Measuring, Miscellaneous Exercises. With an Appendix on Algebra ... Principally Designed for the Use of Schools and AcademiesBell and Bradfute, 1792 - 431 pages |
From inside the book
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Page 3
... chord of an arch is a ftraight line , drawn between the extremities of an arch . 38. The fegment of a circle is that space contained between the chord and arch of the fame circle . 39. A regular polygon is that whofe fides are all equal ...
... chord of an arch is a ftraight line , drawn between the extremities of an arch . 38. The fegment of a circle is that space contained between the chord and arch of the fame circle . 39. A regular polygon is that whofe fides are all equal ...
Page 7
... chords . FROM the angular point A , with the chord of 60 ° for a radius , describe an arch cutting the containing fides , produced , if neceffary , in the points D , E ; take the diftance DE in your compaffes , and apply it to the line ...
... chords . FROM the angular point A , with the chord of 60 ° for a radius , describe an arch cutting the containing fides , produced , if neceffary , in the points D , E ; take the diftance DE in your compaffes , and apply it to the line ...
Page 10
... chord , and bifect it at right angles by BD ; then join AB , and make the angle BAD equal to the angle ABD ; draw AD , then with the point D as centre , and radius DA , DB or DC , defcribe the circle , and it is done . Plate 3+ fig . 39 ...
... chord , and bifect it at right angles by BD ; then join AB , and make the angle BAD equal to the angle ABD ; draw AD , then with the point D as centre , and radius DA , DB or DC , defcribe the circle , and it is done . Plate 3+ fig . 39 ...
Page 12
... chords , fines , tangents , and fecants . About the centre C , with any convenient radius * , describe the femicircle ADB ; erect the perpendicular CF , which will di- vide the femicircle into two quadrants , viz . AD , BD : divide the ...
... chords , fines , tangents , and fecants . About the centre C , with any convenient radius * , describe the femicircle ADB ; erect the perpendicular CF , which will di- vide the femicircle into two quadrants , viz . AD , BD : divide the ...
Page 14
... chords , it will mea- fure 50 ° 46 ' ; and if AB be measured from the fame diagonal fcale , it will measure 440 , also . BC 359.2 . Plate 3. fig . 44 . PROBLEM XXXI . The two legs of a right - angled triangle beeng given , to find the ...
... chords , it will mea- fure 50 ° 46 ' ; and if AB be measured from the fame diagonal fcale , it will measure 440 , also . BC 359.2 . Plate 3. fig . 44 . PROBLEM XXXI . The two legs of a right - angled triangle beeng given , to find the ...
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Common terms and phrases
abfciffa acres againſt alfo alſo altitude amplitude axis bafe baſe becauſe breadth centre chain chord of half circle circumference Co-fec Co-tan column cone conjugate cube defcribe dift diſtance divide divifor elevation Engliſh equal Euclid EXAMPLE fame fecond fegment fhall fimilar find the area find the folidity firſt fquare root fquare yards fruftum ftraight line fubtract fuch fuperficies furface girt given greateſt half the arch height horizontal houſe hypothenufe inftrument laft acquired velocity laſt lefs logarithm malt bufhels meaſure obferved off-fets oppofite ordinate parabolic perpendicular plane Plate quantity quotient rectangle Required the area Required the content Required the folidity rhombus right angles RULE Secant Secant Co-fec ſpace ſphere ſpindle ſquare ſteeple Suppofe tangent theodolite theſe thickneſs tranfverfe trapezium triangle triangular uſed verfed whofe diameter whofe fide whofe length whoſe wine gallons
Popular passages
Page 27 - 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, etc.
Page 115 - Therefore all the angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Page 3 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Page 232 - E, is equal to twice as many right angles as the figure has sides, less four right angles.
Page 1 - ... common to the two triangles AFE, BFE, there are two sides in the one equal to two sides in the other, each to each ; and the base EA is equal to the base EB ; (i.
Page 38 - BG; that is, the fum of the fides is to their difference, as the tangent of half the fum of the angles at the bafe to the tangent of half their difference.
Page 372 - Subtract the square number from the left hand period, and to the remainder bring down the next period for a dividend. III. Double the root already found for a divisor ; seek how many times the divisor is contained...
Page 38 - AB the greater side for a distance, let a circle be described, meeting AC, produced in E, F, and BC in D; join DA, EB, FB; and draw FG parallel to BC, meeting EB in G. The angle EAB (32.
Page 38 - ACB (32. 1.) is equal to the angles CAD and ADC, or ABC together ; therefore FAD is the difference of the angles at the...
Page 395 - TO divide a given ftraight line into two parts, fo that the rectangle contained by the whale, and one of the parts, fhall be equal to the fquare of the other part. Let AB be the given ftraight line; it is required to divide it into two parts, fo that the rectangle contained by the whole, and one of the parts, fhall be equal to the fquare of the other part. Upon AB...