The Elements of Euclid: With Many Additional Propositions, & Explanatory Notes, Etc, Μέρος 1John Weale, 1853 - 136 σελίδες |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 5 από τα 45.
Σελίδα 11
... angles at the bases , which are opposite to the equal sides , will be equal ( E to B and F to C ) ; [ 3 ] and the triangles themselves will be equal . 13 E DEMONSTRATION . For , if the triangle ABC be applied to DEF , so that the point ...
... angles at the bases , which are opposite to the equal sides , will be equal ( E to B and F to C ) ; [ 3 ] and the triangles themselves will be equal . 13 E DEMONSTRATION . For , if the triangle ABC be applied to DEF , so that the point ...
Σελίδα 12
... ABC be a triangle in which neither A nor C are right angles and A is less than C ; then from B as a center , and the distance BC as radius , describe a circle cutting AC in D , and draw DB . Now it is evident that , in the triangles ABC and ...
... ABC be a triangle in which neither A nor C are right angles and A is less than C ; then from B as a center , and the distance BC as radius , describe a circle cutting AC in D , and draw DB . Now it is evident that , in the triangles ABC and ...
Σελίδα 13
... angle A is common to both ; therefore the base CF is equal to the base BG ... ABC , will be equal ( g ) , which are the angles at the base of the given ... angles themselves are equal ( c ) ; the greater ELEMENTS OF GEOMETRY . 13.
... angle A is common to both ; therefore the base CF is equal to the base BG ... ABC , will be equal ( g ) , which are the angles at the base of the given ... angles themselves are equal ( c ) ; the greater ELEMENTS OF GEOMETRY . 13.
Σελίδα 14
... ABC to the lesser DBC , which is absurd ; therefore neither of the sides AC or AB being greater than the other , they are equal . COROLLARY . Hence every equiangular triangle is also equi- lateral , which may be shown by taking each ...
... ABC to the lesser DBC , which is absurd ; therefore neither of the sides AC or AB being greater than the other , they are equal . COROLLARY . Hence every equiangular triangle is also equi- lateral , which may be shown by taking each ...
Σελίδα 15
... angle ECD is greater than the angle BCD ( c ) ; and because FDC and ECD are ... ( ABC and DEF ) have two sides of the one respectively equal to two sides of ... angles opposite the equal sides ELEMENTS OF GEOMETRY . 15.
... angle ECD is greater than the angle BCD ( c ) ; and because FDC and ECD are ... ( ABC and DEF ) have two sides of the one respectively equal to two sides of ... angles opposite the equal sides ELEMENTS OF GEOMETRY . 15.
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...