The MathematicianJ. Wilcox, 1751 - 399 σελίδες |
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Σελίδα 99
... Construction ) AG : EG :: EG : m , and AG EG : DG : FG ( by 35. Eu . 3. ) ; therefore DG : FG :: EG : m , and , by Permutation , DG : EG :: FG : m ; that is , as R to S. Q. E. D. PROBLEM IX . Anfwered by Mr. John Turner . CONSTRUCTION ...
... Construction ) AG : EG :: EG : m , and AG EG : DG : FG ( by 35. Eu . 3. ) ; therefore DG : FG :: EG : m , and , by Permutation , DG : EG :: FG : m ; that is , as R to S. Q. E. D. PROBLEM IX . Anfwered by Mr. John Turner . CONSTRUCTION ...
Σελίδα 100
... X .. Answered by Mr. John Turner , CONSTRUCTION . • From any Point D , in the indefinite Line PQ , draw DE perpendicular to PQ and equal to the given Perpendicular ; then upon E with Radii re- fpectively given 100 The MATHEMATICIAN . 1 ...
... X .. Answered by Mr. John Turner , CONSTRUCTION . • From any Point D , in the indefinite Line PQ , draw DE perpendicular to PQ and equal to the given Perpendicular ; then upon E with Radii re- fpectively given 100 The MATHEMATICIAN . 1 ...
Σελίδα 102
... CONSTRUCTION . DF , Draw AB at Pleasure , in which take ED and upon EF let a Segment of a Circle be de- fcribed to contain an Angle , equal to the given An- gle at the Vertex ; make BDG equal to the Angle C P G D A E F B which the ...
... CONSTRUCTION . DF , Draw AB at Pleasure , in which take ED and upon EF let a Segment of a Circle be de- fcribed to contain an Angle , equal to the given An- gle at the Vertex ; make BDG equal to the Angle C P G D A E F B which the ...
Σελίδα 103
... , the Angles at the Bafe , the Angles which the bifecting Line makes with the Bafe , and the Line itfelf ; whence the Sides will also be given .. PRO- PROBLEM XII . Anfwered by Mr. John Turner . CONSTRUCTION The MATHEMATICIAN . 103.
... , the Angles at the Bafe , the Angles which the bifecting Line makes with the Bafe , and the Line itfelf ; whence the Sides will also be given .. PRO- PROBLEM XII . Anfwered by Mr. John Turner . CONSTRUCTION The MATHEMATICIAN . 103.
Σελίδα 104
PROBLEM XII . Anfwered by Mr. John Turner . CONSTRUCTION . Make CG equal to the given intercepted Line , and join B , G ; in AB produced take BH = BG , and upon the Diameter AH let a Circle be de- scribed cutting DG in E , draw AE and ...
PROBLEM XII . Anfwered by Mr. John Turner . CONSTRUCTION . Make CG equal to the given intercepted Line , and join B , G ; in AB produced take BH = BG , and upon the Diameter AH let a Circle be de- scribed cutting DG in E , draw AE and ...
Συχνά εμφανιζόμενοι όροι και φράσεις
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Δημοφιλή αποσπάσματα
Σελίδα 157 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
Σελίδα 193 - Velocity with which they increase and are generated; I sought a Method of determining Quantities from the Velocities of the Motions or Increments, with which they are generated; and calling these Velocities of the Motions or Increments Fluxions, and the generated Quantities Fluents, I fell by degrees upon the Method of Fluxions, which I have made use of here in the Quadrature of Curves, in the Years 1665 and 1666.
Σελίδα 6 - They found, that similar triangles are to each other in the duplicate ratio of their homologous sides; and, by resolving similar polygons into similar triangles, the same proposition was extended to these polygons also.
Σελίδα 13 - ... all their theorems of this kind. It is often said, that curve lines have been considered by them as polygons of an infinite number of sides. But this principle no where appears in their writings. We never find them resolving any figure, or solid, into infinitely small elements.
Σελίδα 57 - Whatfoever politive ideas we have in our minds of any fpace, duration, or number, let them be ever fo great, they are ftill finite ; but when we fuppofe an inexhauftible remainder, from which we remove all bounds, and wherein we allow the mind an endlefs...
Σελίδα 205 - ... time approach to each other within less than any given difference, become ultimately equal. If you deny it, let them be ultimately unequal, and let their ultimate difference be D, then they cannot approach nearer to equality than quantities having a difference D: which is against the hypothesis.
Σελίδα 193 - I consider mathematical quantities in this place not as consisting of very small parts, but as described by a continued motion. Lines are described, and therefore generated not by the apposition of parts, but by the continued motion of points ; superficies by the motion of lines ; solids by the motion of superficies ; angles by the rotation of the sides ; portions of time by a continual flux ; and so in other quantities. These geneses really take place in the nature of things, and are daily seen...
Σελίδα 65 - ... of the simple addition of rising Moments, or of the continual flux of one Moment, and for that reason ascribe only length to it, and determine its quantity by the length of the line passed over : As a line, I say, is looked upon to be the trace of a point moving forward, being in some sort divisible by a point, and may be divided by Motion one way, viz. as to length ; so Time may be conceived as the trace of a Moment continually flowing, having some kind of divisibility from an Instant, and from...
Σελίδα 192 - ... flowing quantities." For example: I don't here consider Mathematical Quantities as composed of Parts extremely small, but as generated by a continual motion. Lines are described, and by describing are generated, not by any apposition of Parts, but by a continual motion of Points. Surfaces are generated by the motion of Lines, Solids by the motion of Surfaces, Angles by the Rotation of their Legs, Time by a continual flux...
Σελίδα 6 - ... objections that have been made to it. But, before we proceed, it may be of use to consider the...