Euclid's Elements of Geometry: The First Six, the Eleventh and Twelfth Books |
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Seite 11
continue the equal fides A B , AC directly forwards to D and E : I say , the angle ABC is equal to the angle ACB ; and the angle CBD equal to the angle BCE . For in the right line BD , let there be taken any point as F ; and from the ...
continue the equal fides A B , AC directly forwards to D and E : I say , the angle ABC is equal to the angle ACB ; and the angle CBD equal to the angle BCE . For in the right line BD , let there be taken any point as F ; and from the ...
Seite 22
... and continue out A C to G. Then because A e is equal to E C , and B E equal to the Fright line e F , there are two right lines A E , E B equal to two right lines ÇE , E F , each to each ; the angle A E B also E is equal [ by prop .
... and continue out A C to G. Then because A e is equal to E C , and B E equal to the Fright line e F , there are two right lines A E , E B equal to two right lines ÇE , E F , each to each ; the angle A E B also E is equal [ by prop .
Seite 25
... the right lines BD , DC are less than the two remaining fides B A , a c of the triangle , but yet do contain an angle B D c greater than the angle B A C. For continue out the right line B D to the point E. Then because [ by prop .
... the right lines BD , DC are less than the two remaining fides B A , a c of the triangle , but yet do contain an angle B D c greater than the angle B A C. For continue out the right line B D to the point E. Then because [ by prop .
Seite 36
with the right line AD , at the point a therein , make the angle D A E equal to the angle A Dc , and continue D out the right line E A to F. Then B Then because the right line A D falling upon two · 36 Euclid's Elements . Book I.
with the right line AD , at the point a therein , make the angle D A E equal to the angle A Dc , and continue D out the right line E A to F. Then B Then because the right line A D falling upon two · 36 Euclid's Elements . Book I.
Seite 42
For continue out A d both ways to the points e and F ; and through B [ by prop : 31. ] draw the right line B E parallel to the right line c A ; and through c draw C F parallel to BD . A D Then EBCA , DBCF are F both parallelograms ...
For continue out A d both ways to the points e and F ; and through B [ by prop : 31. ] draw the right line B E parallel to the right line c A ; and through c draw C F parallel to BD . A D Then EBCA , DBCF are F both parallelograms ...
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Euclid's Elements of Geometry: The First Six, the Eleventh and Twelfth Books Euclid,David Gregory Keine Leseprobe verfügbar - 2016 |
Häufige Begriffe und Wortgruppen
A B C ABCD added alſo altitude baſe becauſe centre circle circumference common cone continue cylinder definition demonſtrated deſcribed diameter difference divided double draw drawn equal equal angles equiangular equimultiples Euclid exceeds fall fame fides figure firſt folid fore four fourth given right line greater half inſcribed join leſs magnitudes manner meet multiple oppoſite parallel parallelogram perpendicular plane polygon priſms PROP proportional propoſition proved pyramid ratio rectangle remaining angle right angles right line A B right lined figure ſame ſay ſecond ſegment ſhall ſides ſimilar ſince ſolid ſome ſphere ſquare ſtand ſum taken THEOR theſe third thoſe thro touch triangle triangle ABC twice vertex Wherefore whole whoſe baſe
Beliebte Passagen
Seite 245 - 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.
Seite 28 - 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...
Seite 246 - But it was proved that the angle AGB is equal to the angle at F ; therefore the angle at F is greater than a right angle : But by the hypothesis, it is less than a right angle ; which is absurd.
Seite 16 - When a straight line set up on a straight line makes the adjacent angles equal to one another, each of the equal angles is right, and the straight line standing on the other is called a perpendicular to that on which it stands.
Seite 30 - Let the straight line EF, which falls upon the two straight lines AB, CD, make the alternate angles AEF, EFD equal to one another; AB is parallel to CD.
Seite 54 - 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.
Seite 389 - KL: but the cylinder CM is equal to the cylinder EB, and the axis LN to the axis GH; therefore as the cylinder EB to...
Seite 108 - If any two points be taken in the circumference of a circle, the straight line which joins them shall fall within the circle.
Seite 128 - When you have proved that the three angles of every triangle are equal to two right angles...
Seite 181 - FK : in the same manner it may be demonstrated, that FL, FM, FG are each of them equal to FH, or FK : therefore the five straight lines FG, FH, FK, FL, FM are equal to one another : wherefore the circle described from the centre F, at the distance of...