Books 3-9The University Press, 1908 |
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Side 28
... Prop . 12 out of it ( an - Nairīzī , ed . Curtze , pp . 121-2 ) . An - Nairizi and Campanus , conformably with what has been said , number Prop . 13 of Heiberg's text Prop . 12 , and so on through the Book . What was said in the note on ...
... Prop . 12 out of it ( an - Nairīzī , ed . Curtze , pp . 121-2 ) . An - Nairizi and Campanus , conformably with what has been said , number Prop . 13 of Heiberg's text Prop . 12 , and so on through the Book . What was said in the note on ...
Side 31
... prop . I above . And similarly all points ( except A ) on , and all points within , the circumference of the circle O ' are external to the circle O. The two circles , having one common point only , touch at that point , which lies , as ...
... prop . I above . And similarly all points ( except A ) on , and all points within , the circumference of the circle O ' are external to the circle O. The two circles , having one common point only , touch at that point , which lies , as ...
Side 50
... Props . 52 , 53 ) . H If ADB be any segment of a circle , and C be such a point on the circumference that AC is equal to CB , and if there be described with C as centre and radius CA or CB the circle AHB , then , ADB being any other ...
... Props . 52 , 53 ) . H If ADB be any segment of a circle , and C be such a point on the circumference that AC is equal to CB , and if there be described with C as centre and radius CA or CB the circle AHB , then , ADB being any other ...
Side 84
... Prop . 2 can be solved apply here also . Euclid leaves us to satisfy ourselves that the three tangents will meet and form a triangle . This follows easily from the fact that each of the angles AKB , BKC , CKA is less than two right ...
... Prop . 2 can be solved apply here also . Euclid leaves us to satisfy ourselves that the three tangents will meet and form a triangle . This follows easily from the fact that each of the angles AKB , BKC , CKA is less than two right ...
Side 91
... Props . 2-5 with reference to figures of four or more sides , but with the difference that , whereas he dealt with triangles of any form , he confines himself henceforth to regular figures . It happened to be as easy to divide a circle ...
... Props . 2-5 with reference to figures of four or more sides , but with the difference that , whereas he dealt with triangles of any form , he confines himself henceforth to regular figures . It happened to be as easy to divide a circle ...
Vanlige uttrykk og setninger
ABCD angle ABC angle BAC antecedent Aristotle base bisected centre circle ABC circumference construction continued proportion corresponding sides cube number definition diameter drawn enunciation equal angles equiangular equimultiples Euclid Eutocius ex aequali four magnitudes geometrical geometrical progression given circle given straight line greater ratio greatest common measure Heiberg hypothesis Iamblichus joined less mean proportional numbers measures the number multiple multitude Nicomachus odd number parallel parallelogram pentagon polygon Porism prime number Proclus Prop proper fraction proposition PROPOSITION 13 proved rect rectangle rectangle contained rectilineal figure reductio ad absurdum remaining angle right angles segment semicircle similar and similarly similar plane numbers Simson solid numbers square number subtracted taken Theon Theon of Smyrna theorem touches the circle triangle ABC unit VIII δὲ καὶ πρὸς τὸ τοῦ
Populære avsnitt
Side 34 - EQUAL straight lines in a circle are equally distant from the centre ; and those which are equally distant from the centre, are equal to one another.
Side 65 - If a straight line touch a circle, and from the point of contact a chord be drawn, the angles which this chord makes with the tangent are equal to the angles in the alternate segments.
Side 37 - THE straight line drawn at right angles to the diameter of a circle, from the extremity of...
Side 234 - Prove that similar triangles are to one another in the duplicate ratio of their homologous sides.
Side 64 - From this it is manifest that if one angle of a triangle be equal to the other two it is a right angle, because the angle adjacent to it is equal to the same two ; (i.
Side 209 - IN a right-angled triangle, if a perpendicular be drawn from the right angle to the base, the triangles on each side of it are similar to the whole triangle, and to one another.
Side 90 - EF at right angles (9. 1.) to AB, AC ; DF, EF produced meet one another : for, if they do not meet, they are parallel, wherefore AB, AC, which are at right angles to them, are parallel ; which is absurd : let them meet in F, and join FA ; also, if the point F be not in BC, join BF, CF : then, because AD is equal to DB, and DF common, and at right angles to AB, the base AF is equal (4.
Side 80 - In a given circle to place a straight line, equal to a given straight line which is not greater than the diameter of the circle. Let ABC be the given circle, and D the given straight line, not greater than the diameter of the circle.
Side 212 - ... be parallel to the remaining side of the triangle. Let DE be drawn parallel to BC, one of the sides of the triangle ABC : BD is to DA, as CE to EA. Join BE, CD ; Then the triangle BDE is equal to the triangle CDE*, * «.i.
Side 95 - In the same manner, it may be demonstrated that the straight lines EC, ED, are each of them equal to EA or EB ; therefore the four straight lines EA, EB, EC, ED, are equal to one another ; and the circle described from the centre E, at the distance of one of them, shall pass through the extremities of the other three, and be described about the square ABCD.