Elements of Geometry and Conic SectionsHarper, 1849 - 226 páginas |
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Página 114
... plane in which these lines are . Let the straight line AB be perpen- dicular to each of the straight lines CD , EF which intersect at B ; AB will also be perpendicular to the plane MN M which passes through these lines . Through B draw ...
... plane in which these lines are . Let the straight line AB be perpen- dicular to each of the straight lines CD , EF which intersect at B ; AB will also be perpendicular to the plane MN M which passes through these lines . Through B draw ...
Página 115
... plane MN . Cor . 2. Through a given point B in a plane , only one per- pendicular can be drawn to this plane . For , if there could be two perpendiculars , suppose a plane to pass through them , whose intersection with the plane MN is ...
... plane MN . Cor . 2. Through a given point B in a plane , only one per- pendicular can be drawn to this plane . For , if there could be two perpendiculars , suppose a plane to pass through them , whose intersection with the plane MN is ...
Página 116
... plane MN . All the lines AC , AD , AE , & c . , which are equally distant from the perpendicular , have the same inclination to the plane ; because all the angles ACB , ADB ... MN . For in the plane MN , draw CD through the. 116 GEOMETRY .
... plane MN . All the lines AC , AD , AE , & c . , which are equally distant from the perpendicular , have the same inclination to the plane ; because all the angles ACB , ADB ... MN . For in the plane MN , draw CD through the. 116 GEOMETRY .
Página 117
Elias Loomis. For in the plane MN , draw CD through the point B perpendicular to EF . Then , because the planes AE ... plane MN , draw the straight line BD. BOOK VII . 117.
Elias Loomis. For in the plane MN , draw CD through the point B perpendicular to EF . Then , because the planes AE ... plane MN , draw the straight line BD. BOOK VII . 117.
Página 118
Elias Loomis. In the plane MN , draw the straight line BD joining the points B and D. Through the lines AB , BD pass the plane EF ; it will be perpendicular to the plane MN ( Prop . VI . ) ; also , the line CD will lie in this plane ...
Elias Loomis. In the plane MN , draw the straight line BD joining the points B and D. Through the lines AB , BD pass the plane EF ; it will be perpendicular to the plane MN ( Prop . VI . ) ; also , the line CD will lie in this plane ...
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ELEMENTS OF GEOMETRY & CONIC S Elias 1811-1889 Loomis,Making of America Project Sin vista previa disponible - 2016 |
Términos y frases comunes
75 cents ABCD AC is equal allel altitude angle ABC angle ACB angle BAC Anthon's base BCDEF bisected chord circle circumference cone contained convex surface curve described diameter dicular draw drawn ellipse equal angles equal to AC equally distant equiangular equivalent exterior angle foci four right angles frustum greater Hence Prop hyperbola inscribed intersection join latus rectum Let ABC lines AC major axis mean proportional measured by half meet Muslin number of sides ordinate parabola parallelogram parallelopiped pendicular perimeter perpen perpendicular plane MN principal vertex prism PROPOSITION pyramid radii radius ratio rectangle regular polygon right angles Prop Scholium segment Sheep extra side AC similar slant height solid angle sphere spherical triangle square subtangent tangent THEOREM triangle ABC vertex vertices
Pasajes populares
Página 60 - Any two rectangles are to each other as the products of their bases by their altitudes.
Página 27 - VIf two triangles have two angles and the included side of the one, equal to two angles and the included side of the other, each to each, the...
Página 11 - A rhombus, is that which has all its sides equal, but its angles are not right angles.
Página 63 - IF a straight line be divided into any two parts, the square of the whole line is equal to the squares of the two parts, together with twice the' rectangle contained by the parts.
Página 18 - BC common to the two triangles, which is adjacent to their equal angles ; therefore their other sides shall be equal, each to each, and the third angle of the one to the third angle of the other, (26.
Página 10 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it.
Página 15 - If, at a point in a straight line, two other straight lines, upon the opposite sides of it, make the adjacent angles together equal to two right angles, these two straight lines shall be in one and the same straight line.
Página 17 - If two triangles have two sides and the included angle of the one, equal to two sides and the included angle of the other, each to each, the two triangles will be equal.
Página 148 - I.), that every section of a sphere made by a plane is a circle.