The geometry, by T. S. Davies. Conic sections, by Stephen Fenwick |
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Αποτελέσματα 1 - 5 από τα 70.
Σελίδα 20
For any rectilineal figure ABCDE can be divided into as many triangles as the
figure has sides , by drawing straight lines from a point F within the tigure to each
of its angles . And , by the preceding proposition , all the angles of these triangles
...
For any rectilineal figure ABCDE can be divided into as many triangles as the
figure has sides , by drawing straight lines from a point F within the tigure to each
of its angles . And , by the preceding proposition , all the angles of these triangles
...
Σελίδα 37
... the squares of AB , BC are equal to twice the rectangle AB , BC , together with
the square of AC . Upon AB describe ( 46 . 1 . ) the square ADEB , and construct
the figure as in the preceding propositions ; And because AG is equal ( 43 . 1 . ) ...
... the squares of AB , BC are equal to twice the rectangle AB , BC , together with
the square of AC . Upon AB describe ( 46 . 1 . ) the square ADEB , and construct
the figure as in the preceding propositions ; And because AG is equal ( 43 . 1 . ) ...
Σελίδα 56
... EC are greater ( 20 . 1 . ) than BC ; wherefore also AD is greater than BC . And ,
because BC is nearer to the centre than FG , EH is less ( 5 Def . in . ) than EK :
But , as was demonstrated in the preceding , BC is double of BH , and FG double
...
... EC are greater ( 20 . 1 . ) than BC ; wherefore also AD is greater than BC . And ,
because BC is nearer to the centre than FG , EH is less ( 5 Def . in . ) than EK :
But , as was demonstrated in the preceding , BC is double of BH , and FG double
...
Σελίδα 71
... the cases of the preceding exercise is virtually identical with this . 11 . Except
one pair of opposite angles together be equal to the other pair together in a
quadrilateral , a circle cannot be described about the quadrilateral ; but if that
condition ...
... the cases of the preceding exercise is virtually identical with this . 11 . Except
one pair of opposite angles together be equal to the other pair together in a
quadrilateral , a circle cannot be described about the quadrilateral ; but if that
condition ...
Σελίδα 82
the angles BCD , CDE by the straight lines CF , FD , and from the point F , in
which they meet , draw the straight lines FB , FA , FE , to the points B , A , E . It
may be demonstrated , in the same manner B as in the preceding proposition ,
that the ...
the angles BCD , CDE by the straight lines CF , FD , and from the point F , in
which they meet , draw the straight lines FB , FA , FE , to the points B , A , E . It
may be demonstrated , in the same manner B as in the preceding proposition ,
that the ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD angle ABC axis base bisected called centre circle circumference coincide common cone construction contained coordinate planes describe diameter difference dihedral angles distance divided double draw drawn edges equal equal angles equimultiples extremities faces figure four fourth given line given point greater hence horizontal inclination intersection join less likewise magnitudes manner means meet method multiple opposite parallel parallel planes parallelogram pass perpendicular perspective picture plane MN plane of projection position preceding prism problem produced projection Prop proportionals PROPOSITION ratio reason rectangle rectilineal remaining respectively right angles segment shadow shown sides similar sphere square straight line surface taken tangent THEOR third touch trace triangle triangle ABC vertical Whence Wherefore whole
Δημοφιλή αποσπάσματα
Σελίδα 19 - That, if a straight line falling on two straight lines make the interior angles on the same side less than two right angles, the two straight lines, if produced indefinitely, meet on that side on which are the angles less than the two right angles.
Σελίδα 35 - If a straight line be divided into two equal parts, and also into two unequal parts ; the rectangle contained by the unequal parts, together with the square on the line between the points of section, is equal to the square on half the line.
Σελίδα 4 - AB; but things which are equal to the same are equal to one another...
Σελίδα 128 - EQUIANGULAR parallelograms have to one another the ratio which is compounded of the ratios of their sides.* Let AC, CF be equiangular parallelograms, having the angle BCD equal to the angle ECG : the ratio of the parallelogram AC to the parallelogram CF, is the same with the ratio which is compounded of the ratios of their sides. Let BG, CG, be placed in a straight line ; therefore DC and CE are also in a straight line (14.
Σελίδα 8 - If two triangles have two sides of the one equal to two sides of the...
Σελίδα 36 - 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...
Σελίδα 21 - BCD, and the other angles to the other angles, (4. 1.) each to each, to which the equal sides are opposite : therefore the angle ACB is equal to the angle CBD ; and because the straight line BC meets the two straight lines AC, BD, and makes the alternate angles ACB, CBD equal to one another, AC is parallel (27. 1 .) to DB ; and it was shown to be equal to it. Therefore straight lines, &c.
Σελίδα 65 - If a straight line touch a circle, and from the point of contact a straight line be drawn cutting the circle, the angles which this line makes with the line touching the circle shall be equal to the angles which are in the alternate segments of the circle.
Σελίδα 4 - Magnitudes which coincide with one another, that is, which exactly fill the same space, are equal to one another.
Σελίδα 116 - 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.
Πληροφορίες βιβλιογραφίας
| Τίτλος | The geometry, by T. S. Davies. Conic sections, by Stephen Fenwick Τόμος 2 του An Elementary Course of Mathematics, Royal Military Academy, Woolwich |
| Συγγραφέας | Royal Military Academy, Woolwich |
| Εκδότης | J. Weale, 1853 |
| Πρωτότυπο από | Πανεπιστήμιο Χάρβαρντ |
| Ψηφιοποιήθηκε στις | 14 Ιουλ. 2007 |
| Εξαγωγή αναφοράς | BiBTeX EndNote RefMan |