The Elements of Euclid: Also the Book of Euclid's Data ...cor. viz. The first six books, together with the eleventh and twelfth |
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Side 389
Dat . the point F is given . and the points D , E are given ; therefore each of the
straight lines DE , EF , FD is given in magnitude . where- c . 29. Dat . fore the
triangle DEF is given in species d ; and it is similar to the d . 42. Dat . triangle ABC
...
Dat . the point F is given . and the points D , E are given ; therefore each of the
straight lines DE , EF , FD is given in magnitude . where- c . 29. Dat . fore the
triangle DEF is given in species d ; and it is similar to the d . 42. Dat . triangle ABC
...
Side 397
IF F from the vertex of a triangle given in species , a straight line be drawn to the
base in a given angle ; it shall have a given ratio to the base . From the vertex A
of the triangle ABC which is given in fpecies , let AD be drawn to the bafe BC in a
...
IF F from the vertex of a triangle given in species , a straight line be drawn to the
base in a given angle ; it shall have a given ratio to the base . From the vertex A
of the triangle ABC which is given in fpecies , let AD be drawn to the bafe BC in a
...
Side 401
Take a straight line H given in magnitude ; and because the ratio of AB to CD is
given , make the ratio of H to K the same ... 51 , F two straight lines have a given
ratio to one another ; the rectilineal figures given in species described upon them
...
Take a straight line H given in magnitude ; and because the ratio of AB to CD is
given , make the ratio of H to K the same ... 51 , F two straight lines have a given
ratio to one another ; the rectilineal figures given in species described upon them
...
Side 426
3. angle BEC at the center , which is the double 6 of it , is given . and the ratio of
BE to EC is given , because they are equal to one anoC. 44. Dat . ther ; therefore
the triangle BEC is given in species , and the ratio d . 7. Dat . of EB to BC is given
...
3. angle BEC at the center , which is the double 6 of it , is given . and the ratio of
BE to EC is given , because they are equal to one anoC. 44. Dat . ther ; therefore
the triangle BEC is given in species , and the ratio d . 7. Dat . of EB to BC is given
...
Side 433
r a parallelogram equal to a given space be applied to a given straight line ,
deficient by a parallelogram given in species ; the sides of the defect are given .
Let the parallelogram AC equal to a given space be applied to the given straight
line ...
r a parallelogram equal to a given space be applied to a given straight line ,
deficient by a parallelogram given in species ; the sides of the defect are given .
Let the parallelogram AC equal to a given space be applied to the given straight
line ...
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added alſo altitude angle ABC angle BAC baſe becauſe Book Book XI caſe circle circle ABCD circumference common cone cylinder Definition demonſtrated deſcribed diameter divided double draw drawn equal equal angles equiangular equimultiples exceſs fame fides firſt folid fore four fourth given angle given in poſition given in ſpecies given magnitude given ratio given ſtraight line greater Greek half join leſs likewiſe magnitude manner meet muſt oppoſite parallel parallelogram perpendicular plane priſm produced PROP proportionals Propoſition pyramid radius reaſon rectangle rectangle contained remaining right angles ſame ſecond ſegment ſhall ſhewn ſides ſimilar ſolid ſphere ſquare ſquare of AC taken THEOR theſe third thro triangle ABC wherefore whole
Populære avsnitt
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.