Elements of Geometry;: Containing the First Six Books of Euclid, with Two Books on the Geometry of Solids. To which are Added, Elements of Plane and Spherical TrigonometryBell & Bradfute, and G. G. & J. Robinson, London., 1795 - 400 σελίδες |
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Αποτελέσματα 1 - 5 από τα 21.
Σελίδα 105
... tangent DB . But if DCA does not pafs through the centre of the circle Book III b 6. 2 . C 47. I. D £ 3. 3 . ABC , take d the centre E , and draw EF perpendicular e to d 1. 3- AC , and join EB , EC , ED : and because the straight line e ...
... tangent DB . But if DCA does not pafs through the centre of the circle Book III b 6. 2 . C 47. I. D £ 3. 3 . ABC , take d the centre E , and draw EF perpendicular e to d 1. 3- AC , and join EB , EC , ED : and because the straight line e ...
Σελίδα 284
... Tangent of the arch AC , or of the angle ABC . COR . The tangent of half a right angle is equal to the ra- dius . VII . The ftraight line BE between the centre and the extremity of the tangent AE , is called the Secant of the arch AČ ...
... Tangent of the arch AC , or of the angle ABC . COR . The tangent of half a right angle is equal to the ra- dius . VII . The ftraight line BE between the centre and the extremity of the tangent AE , is called the Secant of the arch AČ ...
Σελίδα 285
... tangents , fecants , and verfed fines of certain angles to a given radius , they will exhibit the ratios of the fines ... tangent , and BK the fecant of the fame angle ; CL or BD is the cofine , HK the cotangent , and BK the cofecant of ...
... tangents , fecants , and verfed fines of certain angles to a given radius , they will exhibit the ratios of the fines ... tangent , and BK the fecant of the fame angle ; CL or BD is the cofine , HK the cotangent , and BK the cofecant of ...
Σελίδα 286
... tangent of any angle ABC . " For , fince HK , BA are parallel , the angles HKB , ABC are equal , and KHB , BAE are right angles ; therefore the triangles BAE , KHB are fimilar , and therefore AE is to AB , as BH or BA to HK . COR . 2 ...
... tangent of any angle ABC . " For , fince HK , BA are parallel , the angles HKB , ABC are equal , and KHB , BAE are right angles ; therefore the triangles BAE , KHB are fimilar , and therefore AE is to AB , as BH or BA to HK . COR . 2 ...
Σελίδα 287
... tangent of the angle C ; therefore , CA : AB :: R : tan . C. COR . I. As the radius to the fecant of the angle C , fo the fide adjacent to that angle to the hypotenufe . For CG is the fecant of the angle C ( def . 7. ) , and the ...
... tangent of the angle C ; therefore , CA : AB :: R : tan . C. COR . I. As the radius to the fecant of the angle C , fo the fide adjacent to that angle to the hypotenufe . For CG is the fecant of the angle C ( def . 7. ) , and the ...
Άλλες εκδόσεις - Προβολή όλων
Elements of Geometry: Containing the First Six Books of Euclid, with a ... Formerly Chairman Department of Immunology John Playfair Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2015 |
Elements of Geometry: Containing the First Six Books of Euclid, With Two ... Formerly Chairman Department of Immunology John Playfair,John Playfair Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2017 |
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD adjacent angles alfo alfo equal alſo angle ABC angle ACB angle BAC arch bafe baſe BC is equal becauſe the angle bifected Book VII cafe centre circle ABC circumference co-fine defcribed demonftrated diameter draw drawn equal angles equiangular equilateral equilateral polygon equimultiples Euclid exterior angle faid fame manner fame ratio fame reaſon fecond fection fegment femicircle fhewn fimilar fince firft firſt folid fore fquare of AC ftraight line AB fuch given ſtraight line greater impoffible infcribed interfection join lefs leſs Let ABC line BC magnitudes muſt oppofite angle parallel parallelepiped parallelogram perpendicular polygon prifm propofition proportionals radius rectangle contained rectilineal figure remaining angle right angles ſpace ſpherical triangle ſquare tangent thefe THEOR theſe thoſe touches the circle triangle ABC wherefore
Δημοφιλή αποσπάσματα
Σελίδα 18 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz. either the sides adjacent to the equal...
Σελίδα 155 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Σελίδα 17 - If, at a point in a straight line, two other straight lines upon the opposite sides of it, make the adjacent angles, together equal to two right angles, these two straight lines shall be in one and the same straight line.
Σελίδα 9 - Wherefore, from the given point A, a straight line AL has been drawn equal to the given straight line BC.
Σελίδα 3 - A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight lines drawn from a certain point within the figure to the circumference, are equal to one another.
Σελίδα 23 - 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 12 - ABC: and it has also been proved that the angle FBC is equal to the angle GCB, which are the angles upon the other side of the base. Therefore the angles at the base, &c.
Σελίδα 6 - Let it be granted that a straight line may be drawn from any one point to any other point.
Σελίδα 156 - But by the hypothesis, it is less than a right angle ; which is absurd. Therefore the angles ABC, DEF are not unequal, that is, they are equal : And the angle at A is equal to the angle at D ; wherefore...
Σελίδα 44 - If a straight line be bisected, and produced to any point ; the rectangle contained by the whole line thus produced, and the part of it produced...