Elements of plane geometry, book i, containing nearly the same propositions as the first book of Euclid's Elements1865 |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 5 από τα 8.
Σελίδα 12
... mode of demonstration the very reverse of the synthetic , which is commonly employed in teaching the elements of the science . The former is the method in which researches for the discovery of geometrical truths are conducted ; the ...
... mode of demonstration the very reverse of the synthetic , which is commonly employed in teaching the elements of the science . The former is the method in which researches for the discovery of geometrical truths are conducted ; the ...
Σελίδα 18
... mode of demonstration . It is also worthy of observation , that those geometers who have introduced the idea of motion into their demonstrations have been most successful in demonstrating the truth of Euclid's twelfth axiom . Professors ...
... mode of demonstration . It is also worthy of observation , that those geometers who have introduced the idea of motion into their demonstrations have been most successful in demonstrating the truth of Euclid's twelfth axiom . Professors ...
Σελίδα 19
... mode of proof very different from that by which the equality or inequality of rectilineal figures is established . Supraposition may be fully competent to attain the latter object , but it is found to be altogether incapable of ...
... mode of proof very different from that by which the equality or inequality of rectilineal figures is established . Supraposition may be fully competent to attain the latter object , but it is found to be altogether incapable of ...
Σελίδα 21
... mode of proceeding might be very proper in the earlier stages of the science , but surely there can be no good reason now for excluding the other mode of demonstration from any part of the elements , where it can be introduced with ...
... mode of proceeding might be very proper in the earlier stages of the science , but surely there can be no good reason now for excluding the other mode of demonstration from any part of the elements , where it can be introduced with ...
Σελίδα 25
... mode of proceeding also harmonizes theory and practice , -an object which ought always to be kept steadily in view . As a visible representa- tive of the radiant , the student may be referred to the distance between the two points of ...
... mode of proceeding also harmonizes theory and practice , -an object which ought always to be kept steadily in view . As a visible representa- tive of the radiant , the student may be referred to the distance between the two points of ...
Άλλες εκδόσεις - Προβολή όλων
Elements of Plane Geometry, Book: Containing Nearly the Same Propositions As ... Euclid Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2008 |
Συχνά εμφανιζόμενοι όροι και φράσεις
AB is equal ABC and DEF ABC is equal acute adjacent angles ancient geometers angle ACD angle AGH angle BAC angles ABC angles equal angular magnitude base BC bisect centre circumference coincide diagonal drawn EBCF equal alternate angles equal Def equal to BC Euclid EUCLID'S ELEMENTS exterior angle figure has sides four right angles geometers given point given straight line greater than AC included angle interior opposite angle intersect isosceles triangle join less Let ABC Let the straight method method of exhaustions parallel lines parallel to CD parallelogram ABCD perpendicular PLANE GEOMETRY point F PROB proof properties of parallel PROPOSITION Pythagoras radius rectangle rectilineal figure reductio ad absurdum Scholium side AB side AC straight line BC THEOR theorem three angles three sides triangle ABC triangle DEF triangles are equal truths unequal vertex vertical angle wherefore
Δημοφιλή αποσπάσματα
Σελίδα 43 - If two triangles have two sides and the included angle of the one, equal to two sides and the included angle of the other, each to each, the two triangles will be equal.
Σελίδα 46 - Any two angles of a triangle are together less than two right angles.
Σελίδα 37 - The angles which one straight line makes with another upon one tide of it, are either two right angles, or are together equal to two right angles. Let the straight line AB make with CD, upon one side of it the angles CBA, ABD ; these are either two right angles, or are together equal to two right angles. For, if the angle CBA be equal to ABD, each of them is a right angle (Def.
Σελίδα 57 - 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 38 - ... in one and the same straight line. At the point B in the straight line AB, let the two straight lines BC, BD upon the opposite sides of AB, make the adjacent angles ABC, ABD, equal together to two right angles. BD is in the same straight line with CB.
Σελίδα 68 - 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 34 - LET it be granted that a straight line may be drawn from any one point to any other point.
Σελίδα 64 - Parallelograms upon the same base, and between the same parallels, are equal to one another.
Σελίδα 46 - If one side of a triangle be produced, the exterior angle is greater than either of the interior, and opposite angles.
Σελίδα 34 - Things which are equal to the same thing are also equal to one another. 2. If equals be added to equals, the wholes are equal. 3. If equals be subtracted from equals, the remainders are equal.