The Elements of Euclid: With Many Additional Propositions, & Explanatory Notes, Etc, Μέρος 1John Weale, 1853 - 136 σελίδες |
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Σελίδα 7
... possible , for which reason the 20th proposition , and some others , although as self - evident as any of the axioms , are demonstrated at length . EXPLANATORY REMARKS . A proposition in geometry is something either ELEMENTS OF GEOMETRY .
... possible , for which reason the 20th proposition , and some others , although as self - evident as any of the axioms , are demonstrated at length . EXPLANATORY REMARKS . A proposition in geometry is something either ELEMENTS OF GEOMETRY .
Σελίδα 12
... possible to have two triangles having two sides of the one equal to two sides of the other , and one of the opposite angles of the one equal to the similar angle of the other , and yet for the triangles them- selves not to be equal ...
... possible to have two triangles having two sides of the one equal to two sides of the other , and one of the opposite angles of the one equal to the similar angle of the other , and yet for the triangles them- selves not to be equal ...
Σελίδα 14
... possible , let there be two triangles on the line AB ; then must either [ 1 ] the vertex of each of the triangles be without the other one , or [ 2 ] the vertex of one tri- angle within the other one , or [ 3 ] upon one side of it . A D ...
... possible , let there be two triangles on the line AB ; then must either [ 1 ] the vertex of each of the triangles be without the other one , or [ 2 ] the vertex of one tri- angle within the other one , or [ 3 ] upon one side of it . A D ...
Σελίδα 18
... possible , let the segment AB be common to the two straight lines BC and BD . From the point B draw EB perpendicular to AB ( a ) . Then , because BC is the continuation of the straight line AB , the angles ABE and EBC will both be right ...
... possible , let the segment AB be common to the two straight lines BC and BD . From the point B draw EB perpendicular to AB ( a ) . Then , because BC is the continuation of the straight line AB , the angles ABE and EBC will both be right ...
Σελίδα 19
... possible , let BE , and not BD , be the continuation of the straight line CB . Then ABC and ABE are together equal to two right angles ( a ) , and because ABC and ABD are together equal to two right angles ( b ) , therefore ABC and ABE ...
... possible , let BE , and not BD , be the continuation of the straight line CB . Then ABC and ABE are together equal to two right angles ( a ) , and because ABC and ABD are together equal to two right angles ( b ) , therefore ABC and ABE ...
Άλλες εκδόσεις - Προβολή όλων
The elements of Euclid, [books I.-VI. XI. XII.] with many additional ... Eucleides Πλήρης προβολή - 1853 |
The Elements of Euclid with Many Additional Propositions and Explanatory Notes Henry Law,Eucleides Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
AC and CB AC is equal angle ABC angle BCD angle equal area to double area to twice bisect chord circle ABC circumference Constr CONSTRUCTION COROLLARY DB is equal DEMONSTRATION diagonal divided double the rectangle draw equal angles equal in area equal to AC equilateral Euclid external angle Find the center finite straight line Geometry given angle given line greater Hypoth HYPOTHESES intersect join less line BC lines be drawn magnitude major premiss opposite sides parallel parallelogram perpendicular predicate premises produced proposition quadratic equation reductio ad absurdum right angles SCHOLIA SCHOLIUM second power segment sides AC square on AC square on half squares on AB syllogism termed THEOREM THEOREM.-If triangle ABC twice the rectangle twice the square vertex whole line
Δημοφιλή αποσπάσματα
Σελίδα 24 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Σελίδα 114 - In obtuse-angled triangles, if a perpendicular be drawn from either of the acute angles to the opposite side produced, the square on the side subtending the obtuse angle is greater than the squares on the sides containing the obtuse angle, by twice the rectangle contained by the side...
Σελίδα xiv - 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 : 16. And this point is called the centre of the circle.
Σελίδα 13 - The difference between any two sides of a triangle is less than the third side.
Σελίδα 111 - AFC. (in. 21.) Hence in the triangles ADE, AFC, there are two angles in the one respectively equal to two angles in the other, consequently, the third angle CAF is equal to the third angle DAB ; therefore the arc DB is equal to the arc CF, (in.
Σελίδα 89 - ... the centre of the circle shall be in that line. Let the straight line DE touch the circle ABC in C, and from C let CA be drawn at right angles to DE ; the centre of the circle is in CA.
Σελίδα 70 - EQUAL circles are those of which the diameters are equal, or from the centres of which the straight lines to the circumferences are equal. ' This is not a definition, but a theorem, the truth of ' which is evident; for, if the circles be applied to one ' another, so that their centres coincide, the circles ' must likewise coincide, since the straight lines from
Σελίδα 34 - To describe a parallelogram equal to a given rectilineal figure, and having an angle equal to a given rectilineal angle.
Σελίδα 22 - If a straight line meet two straight lines, so as to make the two interior angles on the same side of it taken together less than two right angles...