Introduction and books 1,2The University Press, 1908 |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 5 από τα 53.
Σελίδα 9
... lemma with a true Greek ring : " to apply to a straight line a rectangle equal to the rectangle contained by AB , AC and deficient by a square . " Moreover the treatise is no fragment , but finishes with the words " end of the treatise ...
... lemma with a true Greek ring : " to apply to a straight line a rectangle equal to the rectangle contained by AB , AC and deficient by a square . " Moreover the treatise is no fragment , but finishes with the words " end of the treatise ...
Σελίδα 12
... lemmas ; of the theorems themselves there are 171. " - 1 Loria ( p . 73 , note ) gives the meaning of this as follows , pointing out that Simson was the discoverer of it : " If a complete n - lateral be deformed so that its sides ...
... lemmas ; of the theorems themselves there are 171. " - 1 Loria ( p . 73 , note ) gives the meaning of this as follows , pointing out that Simson was the discoverer of it : " If a complete n - lateral be deformed so that its sides ...
Σελίδα 13
Euclid. Pappus further gives lemmas to the Porisms ( pp . 866-918 , ed . Hultsch ) . With Pappus ' account of Porisms must be compared the passages of Proclus on the same subject . Proclus distinguishes two senses in which the word ...
Euclid. Pappus further gives lemmas to the Porisms ( pp . 866-918 , ed . Hultsch ) . With Pappus ' account of Porisms must be compared the passages of Proclus on the same subject . Proclus distinguishes two senses in which the word ...
Σελίδα 15
... lemmas given by Pappus in connexion with the treatise . ( 1 ) The first of these lemmas and the figure attached to it ... lemma Pappus states and gives a complete proof of the focus - and - directrix property of a conic , viz . that the ...
... lemmas given by Pappus in connexion with the treatise . ( 1 ) The first of these lemmas and the figure attached to it ... lemma Pappus states and gives a complete proof of the focus - and - directrix property of a conic , viz . that the ...
Σελίδα 19
... lemmas , cases , and so forth . For I am surfeited with these things and shall give little attention to them . But I shall direct my remarks principally to the points which require deeper study and contribute to the sum of philosophy ...
... lemmas , cases , and so forth . For I am surfeited with these things and shall give little attention to them . But I shall direct my remarks principally to the points which require deeper study and contribute to the sum of philosophy ...
Συχνά εμφανιζόμενοι όροι και φράσεις
angle ABC angle ACB angle BAC angles equal Apastamba Apollonius Arabic Archimedes Aristotle assumed axiom base BC bisects Book Campanus centre circle circumference coincide commentary Common Notion congruent construction contained definition diameter drawn edition Elements enunciation equal angles equal sides equal to AC Eucl Euclid Euclid's Elements Eudemus Eutocius exterior angle figure Fihrist follows Geminus geometry given straight line gives gnomon greater Greek Heiberg Heron hypothesis ibid interpolated isosceles triangle joined lemma length less Let ABC magnitude means meet method observed Pappus parallel parallelogram passage perpendicular plane Plato porism Posidonius postulate problem Proclus produced proposition proved Pythagoras Pythagorean Pythagorean theorem quoted rectangle reductio ad absurdum reference remaining angles respectively right angles right-angled triangle says Schol scholia segment semicircle Simplicius Simson square suppose surface Theon Theonine MSS theorem things translation triangle ABC words καὶ τὸ
Δημοφιλή αποσπάσματα
Σελίδα 322 - AB be the given straight line ; it is required to divide it into two parts, so that the rectangle contained by the whole, and one of the parts, shall be equal to the square of the other part.
Σελίδα 204 - After remarking that the mathematician positively knows that the sum of the three angles of a triangle is equal to two right angles...
Σελίδα 259 - If two triangles have two sides of the one equal to two sides of the...
Σελίδα 188 - 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 204 - In any triangle, the sum of the three angles is equal to two right angles, or 180°.
Σελίδα 162 - A plane angle is the inclination to one another of two lines in a plane which meet one another and do not lie in a straight line.
Σελίδα 167 - When a straight line set up on a straight line makes the adjacent angles equal to one another, each of the equal angles is right, and the straight line standing on the other is called a perpendicular to that on which it stands.
Σελίδα 257 - Through a given point to draw a straight line parallel to a given straight line, Let A be the given point, and BC the given straight line : it is required to draw through the point A a straight line parallel to BC.
Σελίδα 176 - Parallel straight lines are straight lines which, being in the same plane and being produced indefinitely in both directions, do not meet one another in either direction.
Σελίδα 235 - Upon the same base, and on the same side of it, there cannot be two triangles that have their sides which are terminated in one extremity of' the base, equal to one another, and likewise those which are terminated in the other extremity.