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 42.
Σελίδα 7
... whole is greater than its part . 10. Two straight lines cannot enclose a space . SCHOLIUM . This axiom may be otherwise expressed , namely , " If two straight lines coincide in two points , they coincide when produced . " 11. All right ...
... whole is greater than its part . 10. Two straight lines cannot enclose a space . SCHOLIUM . This axiom may be otherwise expressed , namely , " If two straight lines coincide in two points , they coincide when produced . " 11. All right ...
Σελίδα 16
... whole angles EDF and EGF will be equal ( c ) . But the angle EGF is equal to ... line drawn from A to F will bisect the angle BAC . DEMONSTRATION . Because ... line AF . B. D ( a ) I. 3 . ( b ) I. 1 . ( c ) Solution . ( d ) I. 8 . SCHOLIA ...
... whole angles EDF and EGF will be equal ( c ) . But the angle EGF is equal to ... line drawn from A to F will bisect the angle BAC . DEMONSTRATION . Because ... line AF . B. D ( a ) I. 3 . ( b ) I. 1 . ( c ) Solution . ( d ) I. 8 . SCHOLIA ...
Σελίδα 19
... lines stand on the same side of another straight line at the same point , and make angles with it , all those angles are together equal to two right angles . COROLLARY 2. Also , if two straight lines intersect , the four angles which ...
... lines stand on the same side of another straight line at the same point , and make angles with it , all those angles are together equal to two right angles . COROLLARY 2. Also , if two straight lines intersect , the four angles which ...
Σελίδα 20
... line except BD can be the continua- tion of CB ; therefore BD and CB form one continued straight line . SCHOLIUM ... whole four taken together are equal to four right angles ( c ) , therefore CEA and CEB taken together are equal to two right ...
... line except BD can be the continua- tion of CB ; therefore BD and CB form one continued straight line . SCHOLIUM ... whole four taken together are equal to four right angles ( c ) , therefore CEA and CEB taken together are equal to two right ...
Σελίδα 33
... line parallel to a given straight line ( BC ) . SOLUTION . In the line BC ... lines EF and BC , forms the alternate angles DAE and ADC equal ( 6 ) , therefore ... whole external angle ACD is equal to the two internal angles A and B ( d ) ...
... line parallel to a given straight line ( BC ) . SOLUTION . In the line BC ... lines EF and BC , forms the alternate angles DAE and ADC equal ( 6 ) , therefore ... whole external angle ACD is equal to the two internal angles A and B ( d ) ...
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...