The First Six Books: Together with the Eleventh and TwelfthJ. Balfour, 1781 - 520 σελίδες |
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Αποτελέσματα 1 - 5 από τα 100.
Σελίδα 18
... join FC , GB . A Because AF is equal to AG , and AB to AC , the two fides FA , AC are equal to the two GA , AB , each to each ; and they contain the angle FAG com- mon to the two triangles AFC , AGB ; therefore the bafe FC is e- qual to ...
... join FC , GB . A Because AF is equal to AG , and AB to AC , the two fides FA , AC are equal to the two GA , AB , each to each ; and they contain the angle FAG com- mon to the two triangles AFC , AGB ; therefore the bafe FC is e- qual to ...
Σελίδα 19
... join DC ; there- fore , because in the triangles DBC , ACB , DB is equal to AC , and BC common to both , the two fides DB , BC are equal to the two AC , CB , each to each ; and the angle DBC is equal to the angle ACB ; therefore the ...
... join DC ; there- fore , because in the triangles DBC , ACB , DB is equal to AC , and BC common to both , the two fides DB , BC are equal to the two AC , CB , each to each ; and the angle DBC is equal to the angle ACB ; therefore the ...
Σελίδα 21
... join DE , and upon it de- fcribe an equilateral triangle DEF ; then join AF ; the ftraight line AF bifects the angle BAC . Becaufe AD is equal to AE , and AF is common to the two triangles DAF , EAF ; the two fides DA , AF , are ...
... join DE , and upon it de- fcribe an equilateral triangle DEF ; then join AF ; the ftraight line AF bifects the angle BAC . Becaufe AD is equal to AE , and AF is common to the two triangles DAF , EAF ; the two fides DA , AF , are ...
Σελίδα 22
... join FC ; the ftraight line FC drawn from the given point C is at right angles to the given straight line AB . Because DC is equal to CE , and FC common to the two triangles DCF , ECF ; the two AD fides DC , CF , are equal to the ...
... join FC ; the ftraight line FC drawn from the given point C is at right angles to the given straight line AB . Because DC is equal to CE , and FC common to the two triangles DCF , ECF ; the two AD fides DC , CF , are equal to the ...
Σελίδα 23
... join CF , C IO . I. CH , CG ; the ftraight line CH , drawn from the given point C , is perpendicular to the given straight line AB . с I. e 8. I. Because FH is equal to HG , and HC common to the two triangles FHC , GHC , the two fides ...
... join CF , C IO . I. CH , CG ; the ftraight line CH , drawn from the given point C , is perpendicular to the given straight line AB . с I. e 8. I. Because FH is equal to HG , and HC common to the two triangles FHC , GHC , the two fides ...
Άλλες εκδόσεις - Προβολή όλων
The First Six Books: Together with the Eleventh and Twelfth Euclid Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
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Δημοφιλή αποσπάσματα
Σελίδα 472 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.
Σελίδα 170 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Σελίδα 81 - THE straight line drawn at right angles to the diameter of a circle, from the extremity of...
Σελίδα 105 - DEF are likewise equal (13. i.) to two right angles ; therefore the angles AKB, AMB are equal to the angles DEG, DEF, of which AKB is equal to DEG ; wherefore the remaining angle AMB is equal to the remaining angle DEF.
Σελίδα 167 - AC the same multiple of AD, that AB is of the part which is to be cut off from it : join BC, and draw DE parallel to it : then AE is the part required to be cut off.
Σελίδα 10 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle; and the straight line which stands on the other is called a perpendicular to it.
Σελίδα 62 - 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 112 - To describe an equilateral and equiangular pentagon about a given circle. • Let ABCDE be the given circle; it is required to describe an equilateral and equiangular pentagon about the circle ABCDE. Let the angles of a pentagon, inscribed in the circle...
Σελίδα 200 - 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 38 - F, which is the common vertex of the triangles ; that is, together with four right angles. Therefore all the angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.