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 |
Dentro del libro
Resultados 1-5 de 100
Página 11
... greater than the other . let AB be the greater , and from it cut off DB equal to AC , a . 3. 1 . the less , and join DC . therefore because in the triangles DBC , ACB , DB is equal to A AC , and BC common to both , the two fides DB , BC ...
... greater than the other . let AB be the greater , and from it cut off DB equal to AC , a . 3. 1 . the less , and join DC . therefore because in the triangles DBC , ACB , DB is equal to A AC , and BC common to both , the two fides DB , BC ...
Página 12
... greater than BCD ; much more then is the angle BDC greater than the angle BCD . again , because CB is e- qual to DB , the angle BDC is equal a to the angle BCD ; but BDC has been proved to be greater than the fame BCD , which is ...
... greater than BCD ; much more then is the angle BDC greater than the angle BCD . again , because CB is e- qual to DB , the angle BDC is equal a to the angle BCD ; but BDC has been proved to be greater than the fame BCD , which is ...
Página 18
... greater than the angle ECF , there- fore the angle ACD is greater than BAE . in the fame manner , if the fide BC be bisected , it may be demonstrated that the angle BCG , that is d , the angle ACD , is greater than the angle ABC ...
... greater than the angle ECF , there- fore the angle ACD is greater than BAE . in the fame manner , if the fide BC be bisected , it may be demonstrated that the angle BCG , that is d , the angle ACD , is greater than the angle ABC ...
Página 19
... greater than the angles ABC , ACB . but ACD , ACB are together equal to two right angles ; therefore the angles ABC ... greater fide of HE greater fide of every triangle is oppofite to the greater angle . Let ABC be a triangle of ...
... greater than the angles ABC , ACB . but ACD , ACB are together equal to two right angles ; therefore the angles ABC ... greater fide of HE greater fide of every triangle is oppofite to the greater angle . Let ABC be a triangle of ...
Página 20
... greater than AB . wherefore the greater angle , & c . Q. E. D. See N. A a . 3. 1 . b . 5. 1 . PROP . XX . THEOR . NY two fides of a than the third side . triangle are together greater Let ABC be a triangle ; any two fides of it ...
... greater than AB . wherefore the greater angle , & c . Q. E. D. See N. A a . 3. 1 . b . 5. 1 . PROP . XX . THEOR . NY two fides of a than the third side . triangle are together greater Let ABC be a triangle ; any two fides of it ...
Términos y frases comunes
alſo altitude angle ABC angle BAC baſe BC BC is equal BC is given becauſe the angle becauſe the ratio biſected Book XI cafe cauſe circle ABCD circumference cone conſtruction cylinder demonſtrated deſcribed diameter drawn EFGH equal angles equiangular equimultiples Euclid exceſs fame multiple fame ratio fame reaſon fides fimilar firſt folid angle fore given angle given in magnitude given in poſition given in ſpecies given magnitude given ratio given ſtraight line gnomon greater join leſs likewife oppoſite parallel parallelepipeds parallelogram paſs perpendicular plane angles priſm PROP proportionals Propoſition pyramid rectangle contained rectilineal figure right angles ſame ſecond ſegment ſhall ſhall be equal ſhewn ſide ſolid ſome ſpace ſphere ſquare of AC ſtraight line AC THEOR theſe thoſe thro triangle ABC vertex wherefore
Pasajes populares
Página 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.
Página 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.
Página 1 - 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, fourths, &c.
Página 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.
Página 73 - THE straight line drawn at right angles to the diameter of a circle, from the extremity of...
Página 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.
Página 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.
Página 323 - Equiangular parallelograms have to one another the ratio which is compounded of the ratios of their sides.
Página 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.
Página 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.