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 σελίδες |
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Αποτελέσματα 1 - 5 από τα 28.
Σελίδα 29
... fix things to be confidered , viz . three fides and three angles . All the angles in a triangle , are together equal to two right angles , or 180 ° . If , therefore , two angles of a triangle are given , the third is alfo given , for it ...
... fix things to be confidered , viz . three fides and three angles . All the angles in a triangle , are together equal to two right angles , or 180 ° . If , therefore , two angles of a triangle are given , the third is alfo given , for it ...
Σελίδα 47
... fixed on the diameter of the theodolite , which are called the fixed fights . Fig . 2. plate 4 . Sights are small pieces of wood or brafs , having small holes or flits in them , to view the object through ; --- They are fixed ...
... fixed on the diameter of the theodolite , which are called the fixed fights . Fig . 2. plate 4 . Sights are small pieces of wood or brafs , having small holes or flits in them , to view the object through ; --- They are fixed ...
Σελίδα 56
... unkown height , BC a horizon- tal plane , and ED a staff of a known length . At any conve- venient diftance from the pole , fix your staff perpendicular nient 36 MENSURATION OF To find the Height of an Object by means of one Staff,
... unkown height , BC a horizon- tal plane , and ED a staff of a known length . At any conve- venient diftance from the pole , fix your staff perpendicular nient 36 MENSURATION OF To find the Height of an Object by means of one Staff,
Σελίδα 57
... fix your staff perpendicular in the ground , then move backwards or forwards , till you find the point C , whence ... fixed my staff perpendicular to the ho- rizontal plane , the length of the staff , is 4 feet , and of the fhadow , 6 ...
... fix your staff perpendicular in the ground , then move backwards or forwards , till you find the point C , whence ... fixed my staff perpendicular to the ho- rizontal plane , the length of the staff , is 4 feet , and of the fhadow , 6 ...
Σελίδα
... fixed fights ; then turn the index , till through the fights upon it , you fee any acceffible object B ; then place the inftrument at the point B , directing the fixed fights to the firft ftation A , and the moveable ones to the point F ...
... fixed fights ; then turn the index , till through the fights upon it , you fee any acceffible object B ; then place the inftrument at the point B , directing the fixed fights to the firft ftation A , and the moveable ones to the point F ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
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
Δημοφιλή αποσπάσματα
Σελίδα 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.
Σελίδα 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.
Σελίδα 3 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Σελίδα 232 - E, is equal to twice as many right angles as the figure has sides, less four right angles.
Σελίδα 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.
Σελίδα 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.
Σελίδα 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...
Σελίδα 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.
Σελίδα 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...
Σελίδα 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...