The First Six Books of the Elements of Euclid, with a Commentary and Geometrical Exercises: To which are Annexed a Treatise on Solid Geometry, and a Short Essay on the Ancient Geometrical AnalysisJohn Taylor, 30 Upper Gower Street, Bookseller and Publisher to the University: and sold, 1828 - 324 páginas |
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Página 1
... surface are lines . ( 7 ) VII . A plane surface is that which lies evenly between its extremities . * ( 8 ) These definitions require some elucidation . The object of Geometry is the properties of figure , and figure is defined to be ...
... surface are lines . ( 7 ) VII . A plane surface is that which lies evenly between its extremities . * ( 8 ) These definitions require some elucidation . The object of Geometry is the properties of figure , and figure is defined to be ...
Página 2
... surface . If a mathematical line be conceived to move , and to leave in the space through which it passes a trace or track , this trace or track will be a surface ; and since the line has no breadth , the surface can have no thickness ...
... surface . If a mathematical line be conceived to move , and to leave in the space through which it passes a trace or track , this trace or track will be a surface ; and since the line has no breadth , the surface can have no thickness ...
Página 3
... surface . Those who do not know what the words ' straight line ' and ' plane surface ' mean , will never collect their meaning from these definitions ; and to those who do know the meaning of those terms , definitions are useless . The ...
... surface . Those who do not know what the words ' straight line ' and ' plane surface ' mean , will never collect their meaning from these definitions ; and to those who do know the meaning of those terms , definitions are useless . The ...
Página 6
... surface , inclosed on all sides by a line or lines . The entire length of the line or lines , which inclose a figure , is called its perimeter . A figure whose surface is a plane is called a plane figure . The first six books of the ...
... surface , inclosed on all sides by a line or lines . The entire length of the line or lines , which inclose a figure , is called its perimeter . A figure whose surface is a plane is called a plane figure . The first six books of the ...
Página 39
... surface within its perimeter ) . ( 112 ) If several right lines be drawn from a point to a given right line . 1 ° The shortest is that which is perpendicular to it . 2 ° Those equally inclined to the perpendicular are equal , and vice ...
... surface within its perimeter ) . ( 112 ) If several right lines be drawn from a point to a given right line . 1 ° The shortest is that which is perpendicular to it . 2 ° Those equally inclined to the perpendicular are equal , and vice ...
Otras ediciones - Ver todas
The First Six Books of the Elements of Euclid: With a Commentary and ... Dionysius Lardner Sin vista previa disponible - 2018 |
Términos y frases comunes
A B and B C A B D altitude angles A B C arcs Book centre circumference circumscribed coincide conical surface constructed demonstration diagonal diameter difference draw equal angles equal hyp equal sides equi equiangular equilateral triangle equimultiples Euclid external angle extremities geometry given circle given line given point given right line Hence homologous sides hypotenuse inscribed intersect isosceles triangle less magnitudes multiple opposite parallel parallelogram parallelopiped pentagon perpendicular plane polygon prism problem produced PROPOSITION proved pyramid radii radius rectangle rectilinear figure respectively equal right line A B segments sides A B similar solid angle square of A B surface tangent THEOREM third tiples triangles A B C vertex
Pasajes populares
Página 16 - If two triangles have two sides of the one respectively equal to two sides of the other, and the contained angles supplemental, the two triangles are equal.
Página 24 - 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.
Página 22 - DE : but equal triangles on the same base and on the same side of it, are between the same parallels ; (i.
Página 104 - ... be equimultiples, the one of the second, and the other of the fourth. Let A the first be the same multiple of B the second, that C the third is of D the fourth ; and of A, C let equimultiples EF, GH be taken.
Página 107 - ... If there be three magnitudes, and other three, which have the same ratio taken two and two, but in a cross order; then if the first magnitude be greater than the third, the fourth shall be greater than the sixth: and if equal, equal; and if less, less.
Página 107 - N ; and if equal, equal ; and if less, less : but if G be greater than L, it has been shown that L HC K E M F N H is greater than M ; and if equal, equal; and if less, less: therefore, if G be greater than L, K is greater than N ; and if equal, equal ; and if less less : and G, K are any equimultiples whatever of A, E ; and L, N any whatever of B, F : therefore as A is to B, so is E to F (5.
Página 187 - If two angles of one triangle are equal to two angles of another triangle, the third angles are equal, and the triangles are mutually equiangular.
Página 107 - IF the first be to the second as the third to the fourth, and if the first be a multiple, or part of the second; the third is the same multiple, or the same part of the fourth...
Página 107 - THEOR. IF the first be the same multiple of the second, or the same part of it, that the third is of the fourth ; the first is to the second, as the third is to the fourth...
Página 107 - D (as in fig. 2 and 3), this magnitude can be multiplied, so as to become greater than D, whether it be AC, or CB. Let it be multiplied until it...