The Elements of Euclid |
Inni boken
Side 89
Let ABCDE be the given equilateral and equiangular pentagon : it is required to
inscribe a circle in the pentagon ABCDE . Bisect ( 9 . 1 . ) the angles BCD , CDE
by the straight lines CF , DF , and from the point F , in which they meet , draw the
...
Let ABCDE be the given equilateral and equiangular pentagon : it is required to
inscribe a circle in the pentagon ABCDE . Bisect ( 9 . 1 . ) the angles BCD , CDE
by the straight lines CF , DF , and from the point F , in which they meet , draw the
...
Side 179
At a given point in a given straight line , to make a solid angle equal to a given
solid angle contained by three plane angles . * Let AB be a given straight line , A
a given point in it , and Da given solid angle contained by the three plane angles
...
At a given point in a given straight line , to make a solid angle equal to a given
solid angle contained by three plane angles . * Let AB be a given straight line , A
a given point in it , and Da given solid angle contained by the three plane angles
...
Side 241
... that he may supply the omission he blames Euclid for ; which determination is II
that any of the three straight lines DM ... on which this 29th depends , has given a
great deal to do , both to ancient and modern geometers : it seems not to be ...
... that he may supply the omission he blames Euclid for ; which determination is II
that any of the three straight lines DM ... on which this 29th depends , has given a
great deal to do , both to ancient and modern geometers : it seems not to be ...
Side 311
in it ; the straight line drawn to C , which makes a given angle with CB , is given in
position . Because the angle is given , one equal to it can be found ( 1 . def . ) ; let
this be the angle at D : at the given A point C , in the given straight line AB ...
in it ; the straight line drawn to C , which makes a given angle with CB , is given in
position . Because the angle is given , one equal to it can be found ( 1 . def . ) ; let
this be the angle at D : at the given A point C , in the given straight line AB ...
Side 321
From the centre D , at the distance DH , describe the circle KHF which
necessarily meets the straight line EF in two points , because DH is greater than
DG , and less than DE . Let the < circle meet EF in the points F , K which are B
given , as ...
From the centre D , at the distance DH , describe the circle KHF which
necessarily meets the straight line EF in two points , because DH is greater than
DG , and less than DE . Let the < circle meet EF in the points F , K which are B
given , as ...
Hva folk mener - Skriv en omtale
Vi har ikke funnet noen omtaler på noen av de vanlige stedene.
Andre utgaver - Vis alle
Vanlige uttrykk og setninger
added altitude angle ABC angle BAC base BC is given centre circle circle ABCD circumference common cone contained cylinder definition demonstrated described diameter divided double draw drawn equal equal angles equiangular equimultiples Euclid excess fore four fourth given angle given in magnitude given in position given in species given magnitude given ratio given straight line gles greater Greek half join less likewise magnitude manner meet multiple Note opposite parallel parallelogram pass perpendicular plane prism produced PROP proportionals proposition pyramid Q. E. D. PROP reason rectangle rectangle contained remaining right angles segment shown sides similar sine solid sphere square square of BC taken THEOR third triangle ABC wherefore whole
Populære avsnitt
Side 36 - If a straight line be divided into any two parts, the squares of the whole line and of one of the parts are equal to twice the rectangle contained by the whole and that part, together with the square of the other part. Let the straight line AB be divided into any two parts at the point C : the squares of AB, BC shall be equal to twice the rectangle AB, BC, together with the square of AC.
Side 145 - Wherefore, in equal circles &c. QED PROPOSITION B. THEOREM If the vertical angle of a triangle be bisected by a straight line which likewise cuts the base, the rectangle contained by the sides of the triangle is equal to the rectangle contained by the segments of the base, together with the square on the straight line which bisects the angle.
Side 65 - The angle in a semicircle is a right angle; the angle in a segment greater than a semicircle is less than a right angle; and the angle in a segment less than a semicircle is greater than a right angle.
Side 248 - Again ; the mathematical postulate, that " things which are equal to the same are equal to one another," is similar to the form of the syllogism in logic, which unites things agreeing in the middle term.
Side 11 - If one side of a triangle be produced, the exterior angle is greater than either of the interior opposite angles.
Side 121 - 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 21 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Side 14 - To construct a triangle of which the sides shall be equal to three given straight lines ; but any two whatever of these lines must be greater than the third (20.
Side 80 - 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...
Side 133 - ... rectilineal figures are to one another in the duplicate ratio of their homologous sides.
Bibliografisk informasjon
| Tittel | The Elements of Euclid |
| Forfatter | Euclid |
| Redaktør | Robert Simson |
| Utgiver | Desilver, Thomas, 1838 |
| Original fra | Harvard University |
| Digitalisert | 29. sep 2005 |
| Lengde | 416 sider |
| Eksporter sitat | BiBTeX EndNote RefMan |