The school Euclid: comprising the first four books, by A.K. Isbister |
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Αποτελέσματα 1 - 5 από τα 25.
Σελίδα
In the former case , the conclusion is expressed in the ordinary way ; in the latter , the word ' assumed ' is employed in ... to indicate that the reasoning proceeds on a false assumption , although the reasoning itself is correct .
In the former case , the conclusion is expressed in the ordinary way ; in the latter , the word ' assumed ' is employed in ... to indicate that the reasoning proceeds on a false assumption , although the reasoning itself is correct .
Σελίδα
In the former case , the conclusion is expressed in the ordinary way ; in the latter , the word ' assumed ' is employed in ... to indicate that the reasoning proceeds on a false assumption , although the reasoning itself is correct .
In the former case , the conclusion is expressed in the ordinary way ; in the latter , the word ' assumed ' is employed in ... to indicate that the reasoning proceeds on a false assumption , although the reasoning itself is correct .
Σελίδα 12
DEMONSTRATION Then in the triangles DBC , ACB , because DB is assumed to be equal to AC , and BC is common to both , the two sides DB , BC , are equal to the two AC , CB , each to each ; and the angle DBC is equal to the angle ACB ...
DEMONSTRATION Then in the triangles DBC , ACB , because DB is assumed to be equal to AC , and BC is common to both , the two sides DB , BC , are equal to the two AC , CB , each to each ; and the angle DBC is equal to the angle ACB ...
Σελίδα 13
DEMONSTRATION Because , in the triangle ACD , AC is assumed to be equal to AD , therefore the angle ACD must be equal to the angle ADC ; ( 1 5 ) but the angle ACD is greater than the angle BCD ; ( ax . 9 ) therefore the angle ADC must ...
DEMONSTRATION Because , in the triangle ACD , AC is assumed to be equal to AD , therefore the angle ACD must be equal to the angle ADC ; ( 1 5 ) but the angle ACD is greater than the angle BCD ; ( ax . 9 ) therefore the angle ADC must ...
Σελίδα 14
Again , because in the triangle BCD , CB is assumed to be equal to ᎠᏴ , therefore the angle BDC must be equal to the angle BCD ; ( 1. 5 ) but BDC has been proved to be greater than BCD ; wherefore the angle BDC must be both equal to ...
Again , because in the triangle BCD , CB is assumed to be equal to ᎠᏴ , therefore the angle BDC must be equal to the angle BCD ; ( 1. 5 ) but BDC has been proved to be greater than BCD ; wherefore the angle BDC must be both equal to ...
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The School Euclid: Comprising the First Four Books, by A.K. Isbister Euclides Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
The School Euclid: Comprising the First Four Books, by A.K. Isbister Euclides Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD angle ABC angle BAC angle BCD angle equal assumed base base BC BC is equal bisect centre circle ABC circumference coincide common constr CONSTRUCTION DEMONSTRATION describe diameter distance divided double draw Edition equal to AC equilateral and equiangular exterior angle extremity fall figure four given circle given straight line greater half impossible inscribed join less Let ABC likewise manner meet opposite angles parallel parallelogram pass pentagon perpendicular produced proved Q. E. D. PROP reason rectangle contained References-Prop remaining angle right angles segment semicircle shown side BC sides square of AC straight line AC THEOREM third touches the circle triangle ABC twice the rectangle wherefore whole
Δημοφιλή αποσπάσματα
Σελίδα 141 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz. either the sides adjacent to the equal...
Σελίδα 35 - If a side of any triangle be produced, the exterior angle is equal to the two interior and opposite angles ; and the three interior angles of every triangle are equal to two right angles.
Σελίδα 71 - In obtuse-angled triangles, if a perpendicular be drawn from either of the acute angles to the opposite side produced, the square of the side subtending the obtuse angle, is greater than the squares of the sides containing the obtuse angle, by twice the rectangle contained by the side upon which, when produced, the perpendicular falls, and the straight line intercepted without the triangle, between the perpendicular and the obtuse angle. Let ABC be an obtuse-angled triangle, having the obtuse angle...
Σελίδα 33 - 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 61 - If a straight line be bisected and produced to any point, the rectangle contained by the whole line thus produced and the part of it produced, together with the square of...
Σελίδα 43 - Triangles upon equal bases, and between the same parallels, are equal to one another.
Σελίδα 27 - ... shall be greater than the base of the other. Let ABC, DEF be two triangles, which have the two sides AB, AC, equal to the two DE, DF, each to each, viz.
Σελίδα 77 - An angle in a segment is the angle contained by two straight lines drawn from any point in the circumference of the segment to the extremities of the straight line which is the base of the segment.
Σελίδα 15 - The angles which one straight line makes with another upon one side of it, are either two right angles, or are together equal to two right angles.
Πληροφορίες βιβλιογραφίας
| Τίτλος | The school Euclid: comprising the first four books, by A.K. Isbister |
| Συγγραφέας | Euclides |
| Επιμελητής | Alexander Kennedy Isbister |
| Εκδόθηκε | 1862 |
| Πρωτότυπο από | Πανεπιστήμιο Οξφόρδης |
| Ψηφιοποιήθηκε στις | 18 Απρ. 2006 |
| Εξαγωγή αναφοράς | BiBTeX EndNote RefMan |