The Elements of Euclid: Also the Book of Euclid's Data ...cor. viz. The first six books, together with the eleventh and twelfthF. Wingrave, 1804 |
Fra bogen
Resultater 1-5 af 77
Side
... folid angles of the figures is contained by no more than three plane angles ; for in other cafes , two folid figures may be con- tained by fimilar planes of the fame number and magnitude , and yet be unequal to one another , as fhall be ...
... folid angles of the figures is contained by no more than three plane angles ; for in other cafes , two folid figures may be con- tained by fimilar planes of the fame number and magnitude , and yet be unequal to one another , as fhall be ...
Side 188
... folid is a fuperficies . III . A straight line is perpendicular , or at right angles , to a plane , when it makes right angles with every straight line meeting it in that plane . IV . A plane is perpendicular to a plane , when the ...
... folid is a fuperficies . III . A straight line is perpendicular , or at right angles , to a plane , when it makes right angles with every straight line meeting it in that plane . IV . A plane is perpendicular to a plane , when the ...
Side 189
... folid figures are fuch as have all their folid angles equal , See N. each to each , and which are contained by the same number of fimilar planes . XII . A Pyramid is a folid figure contained by planes that are constituted betwixt one ...
... folid figures are fuch as have all their folid angles equal , See N. each to each , and which are contained by the same number of fimilar planes . XII . A Pyramid is a folid figure contained by planes that are constituted betwixt one ...
Side 190
... folid figure contained by fix equal fquares . XXVI . A Tetrahedron is a folid figure contained by four equal and equi- lateral triangles . XXVII . An Octahedron is a folid figure contained by eight equal and equilateral triangles ...
... folid figure contained by fix equal fquares . XXVI . A Tetrahedron is a folid figure contained by four equal and equi- lateral triangles . XXVII . An Octahedron is a folid figure contained by eight equal and equilateral triangles ...
Side 205
... folid angle at A be contained by the three plane angles BAC , CAD , DAB . any two of them are greater than the third ... folid angle , & c . Q. E. D. PROP . XXI . THEOR . E VERY folid angle is contained by plane angles which together are ...
... folid angle at A be contained by the three plane angles BAC , CAD , DAB . any two of them are greater than the third ... folid angle , & c . Q. E. D. PROP . XXI . THEOR . E VERY folid angle is contained by plane angles which together are ...
Almindelige termer og sætninger
alfo alſo angle ABC angle BAC bafe baſe BC is equal BC is given becauſe the angle becauſe the ratio bifected Book XI cafe circle ABCD circumference cone conſtruction cylinder defcribed demonſtrated drawn EFGH equal angles equiangular equimultiples Euclid excefs faid fame multiple fame ratio fecond fegment fhall fhewn fides fides BA fimilar fince firft firſt folid angle fore fquare fquare of AC given angle given in fpecies given in magnitude given in pofition given magnitude given ratio given ſtraight line gnomon greater join lefs leſs likewife line BC muſt oppofite parallel parallelepipeds parallelogram perpendicular plane angles PROP Propofition pyramid rectangle contained rectilineal figure right angles ſame ſhall ſpace ſphere ſquare ſtraight line AB THEOR theſe thro tiple triangle ABC wherefore
Populære passager
Side 157 - D ; wherefore the remaining angle at C is equal to the remaining angle at F ; Therefore the triangle ABC is equiangular to the triangle DEF. Next, let each of the angles at C, F be not less than a right angle ; the triangle ABC is also, in this case, equiangular to the triangle DEF.
Side 24 - ... be equal, each to each ; and also the third angle of the one to the third angle of the other. Let ABC, DEF be two triangles which have the angles ABC, ECA equal to the angles DEF, EFD, viz.
Side 45 - If a straight line be divided into any two parts, the rectangle contained by the whole and one of the parts, is equal to the rectangle contained by the two parts, together with the square of the aforesaid part.
Side 73 - THE straight line drawn at right angles to the diameter of a circle, from the extremity of...
Side 163 - 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.
Side 81 - ELF. Join BC, EF ; and because the circles ABC, DEF are equal, the straight lines drawn from their centres are equal: therefore the two sides BG, GC, are equal to the two EH, HF ; and the angle at G is equal to the angle at H ; therefore the base BC is equal (4.
Side 323 - Equiangular parallelograms have to one another the ratio which is compounded of the ratios of their sides.
Side 80 - EA : and because AD is equal to DC, and DE common to the triangles ADE, CDE, the two sides AD, DE are equal to the two CD, DE, each to each ; and the angle ADE is equal to the angle CDE, for each of them is a right angle ; therefore the base AE is equal (4.
Side 36 - To a given straight line to apply a parallelogram, which shall be equal to a given triangle, and have one of its angles equal to a given rectilineal angle.