The school Euclid: comprising the first four books, by A.K. Isbister1862 |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 5 από τα 54.
Σελίδα 6
... straight lines CA , CB , to the points A , B. ( post . 1. ) Then ABC shall be an equilateral triangle . DEMONSTRATION Because the point A is the centre of the circle BCD , therefore AC is equal to AB ; ( def . 15 ) and because the point ...
... straight lines CA , CB , to the points A , B. ( post . 1. ) Then ABC shall be an equilateral triangle . DEMONSTRATION Because the point A is the centre of the circle BCD , therefore AC is equal to AB ; ( def . 15 ) and because the point ...
Σελίδα 7
... straight line equal to BC . K H D B E CONSTRUCTION From the point A to B ... AL shall be equal to BC . DEMONSTRATION Because the point B is the centre of ... AL is equal to the remainder BG . ( ax . 3. ) But it has been shown that BC is ...
... straight line equal to BC . K H D B E CONSTRUCTION From the point A to B ... AL shall be equal to BC . DEMONSTRATION Because the point B is the centre of ... AL is equal to the remainder BG . ( ax . 3. ) But it has been shown that BC is ...
Σελίδα 8
... straight line AD equal to C ; ( 1.2 ) and from the centre A , at the distance AD , describe the circle DEF . ( post ... AC , equal to the two sides , DE , DF , each to each , viz . AB to DE , and AC to DF ; and the angle BAC equal to the ...
... straight line AD equal to C ; ( 1.2 ) and from the centre A , at the distance AD , describe the circle DEF . ( post ... AC , equal to the two sides , DE , DF , each to each , viz . AB to DE , and AC to DF ; and the angle BAC equal to the ...
Σελίδα 9
... A may be on D , and the straight line AB upon DE ; because AB is equal to DE , therefore the point B shall coincide with the point E ; and AB coinciding with DE , and the angle BAC being equal to the angle EDF , ( hyp . ) therefore AC ...
... A may be on D , and the straight line AB upon DE ; because AB is equal to DE , therefore the point B shall coincide with the point E ; and AB coinciding with DE , and the angle BAC being equal to the angle EDF , ( hyp . ) therefore AC ...
Σελίδα 13
... straight line CD . 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 ...
... straight line CD . 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 ...
Άλλες εκδόσεις - Προβολή όλων
The School Euclid: Comprising the First Four Books, Chiefly from the Text of ... A. K. Isbister Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2009 |
Συχνά εμφανιζόμενοι όροι και φράσεις
AB is equal adjacent angles alternate angles angle ABC angle AGH angle BAC angle BCD angle EAB angle EDF angle equal angles CBA base BC BC is equal circle ABC constr DEMONSTRATION describe the circle diameter double equal angles equal straight lines equal to BC equilateral and equiangular exterior angle given circle given rectilineal angle given straight line gnomon greater inscribed interior and opposite less Let ABC Let the straight opposite angles parallel to CD parallelogram pentagon perpendicular Q. E. D. PROP rectangle AE rectangle contained rectilineal figure References Prop References-Prop remaining angle required to describe right angles segment semicircle side BC square of AC straight line AB straight line AC THEOREM touches the circle triangle ABC triangle DEF twice the rectangle
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.