Solid and Spherical Geometry and Conic Sections: Being a Treatise on the Higher Branches of Synthetical Geometry, Containing the Solid and Spherical Geometry of Playfair ...William and Robert Chambers and sold by all booksellers, 1837 - 164 sider |
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Resultat 1-5 av 81
Side 1
... straight line is perpendicular , or at right angles to a plane , when it makes right angles with every straight line meeting it in that plane . 2. A plane is perpendicular to a plane , when the straight lines drawn in one of the planes ...
... straight line is perpendicular , or at right angles to a plane , when it makes right angles with every straight line meeting it in that plane . 2. A plane is perpendicular to a plane , when the straight lines drawn in one of the planes ...
Side 2
... straight line and plane are parallel , if they do not meet when produced . 8. The angle formed by two intersecting ... straight line cannot be in a plane , and an- other part above it . C If it be possible , let AB , part of the straight ...
... straight line and plane are parallel , if they do not meet when produced . 8. The angle formed by two intersecting ... straight line cannot be in a plane , and an- other part above it . C If it be possible , let AB , part of the straight ...
Side 3
... straight lines which cut one another are in one plane . COR . 2. - Only one plane can pass through three points , or through a straight line and a point ; and these con- ditions therefore are sufficient to determine a plane ...
... straight lines which cut one another are in one plane . COR . 2. - Only one plane can pass through three points , or through a straight line and a point ; and these con- ditions therefore are sufficient to determine a plane ...
Side 4
... straight lines meet all in one point , and a straight line stand at right angles to each of them in that point , these three straight lines are in one and the same plane . Let the straight line AB stand at right angles to each of the ...
... straight lines meet all in one point , and a straight line stand at right angles to each of them in that point , these three straight lines are in one and the same plane . Let the straight line AB stand at right angles to each of the ...
Side 5
... straight line BC is not above the plane in which are BD and BE . Wherefore the three straight lines BC , BD , BE , are in one and the same plane . PROPOSITION VI . THEOREM . If two straight lines be at right angles to the same plane ...
... straight line BC is not above the plane in which are BD and BE . Wherefore the three straight lines BC , BD , BE , are in one and the same plane . PROPOSITION VI . THEOREM . If two straight lines be at right angles to the same plane ...
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Solid and Spherical Geometry and Conic Sections: Being a Treatise on the ... A. Bell Uten tilgangsbegrensning - 1837 |
Solid and Spherical Geometry and Conic Sections: Being a Treatise on the ... William Chambers,Robert Chambers,A Bell Ingen forhåndsvisning tilgjengelig - 2018 |
Solid and Spherical Geometry and Conic Sections: Being a Treatise on the ... William Chambers,Robert Chambers,A Bell Ingen forhåndsvisning tilgjengelig - 2015 |
Vanlige uttrykk og setninger
absciss altitude angle ABC assymptotes base centre CG² circumference common section cone Conic Sections conic surface conjugate axis conjugate diameters cord cosine cotangent dicular directrix distance draw EK KF ellipse equal Pl foci focus given angle given point greater Hence hyperbola hypotenuse inclination intercepted intersection Let ABC line be drawn line of common ordinate parabola parallel planes parallelogram pendicular perpen perpendicular perspective plane passing point of contact pole primitive prism projection pyramid ABCD quadrant radius ratio rectangle right angles segments semi-ordinate semicircle sides similar triangles sine small circle solid angle solid KQ solid less solid parallelopipeds sphere spherical angle spherical triangle square straight lines drawn subcontrary surface tangent THEOREM transverse axis vertex vertical wherefore
Populære avsnitt
Side 50 - 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.
Side 15 - DAB : any two of them shall be greater than the third. If the angles BAC, CAD, DAB be all equal, it is evident that any two of them are greater than the third: but if they are not, let BAC be that angle which is not less than either of the other two, and is greater than one of them DAB; and at the point A, in the straight line AB, make, in the plane * 23.
Side 15 - A cone is a solid figure described by the revolution of a right-angled triangle about one of the sides containing the right angle, which side remains fixed.
Side 25 - LR, the base of which is the parallelogram LQ, and of which LM is one of its insisting straight lines : therefore, because the parallelogram AB is equal to CD, as the base AB is to the base LQ, so is (7.
Side 16 - EC : (i. ax. 5.) and because DA is equal to AE, and AC common, but the base DC greater than the base EC; therefore the angle DAC is greater than the angle EAC ; (i.
Side 17 - DAB, which contain the solid angle at A, are less than four right angles. Next, let the solid angle at A be contained by any number of plane angles BAC, CAD, DAE, EAF, FAB. These shall together be less than four right angles.
Side 11 - THEOH.—If two straight lines be cut by parallel planes, they shall be cut in the same ratio. Let the straight lines AB, CD be cut by the parallel planes GH, KL, MN, in the points A, E, B; C, F...
Side 11 - FD. Join AC, BD, AD, and let AD meet the plane KL in the point X ; and join EX, XF : because the two parallel planes KL, MN are cut by the plane EBDX, the common sections EX, BD are parallel a.
Side 27 - FC, as the solid HD to the solid DC : But the base HF is equal to the base AE, and the solid GK to the solid AB : therefore, as the base AE to the base CF, so is the solid AB to the solid CD.
Side 1 - The inclination of a straight line to a plane is the acute angle contained by that straight line, and another drawn from the point in which the first line meets the plane, to the point in which...