The Elements of Plane and Solid Geometry ...D. Van Nostrand Company, 1890 - 393 sider |
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Side 13
... join AB " are used as an abbreviation for " draw a straight line from A to B. ” The initial letters Q. E. D. , placed at the end of a theorem , stand for the Latin words Quod erat Demonstrandum , meaning which was to be proved . The ...
... join AB " are used as an abbreviation for " draw a straight line from A to B. ” The initial letters Q. E. D. , placed at the end of a theorem , stand for the Latin words Quod erat Demonstrandum , meaning which was to be proved . The ...
Side 21
... Join DP ' , EP ' . Because AB is to PP ' at its middle point , But ... PD = DP ' , and PE = EP ' . ( 60 ) ( 62 ) @@ PE + EP ' > PD + DP ' . ... 2PE > 2PD , ... PE > PD . If the two oblique lines are on opposite sides of PC , as PE and ...
... Join DP ' , EP ' . Because AB is to PP ' at its middle point , But ... PD = DP ' , and PE = EP ' . ( 60 ) ( 62 ) @@ PE + EP ' > PD + DP ' . ... 2PE > 2PD , ... PE > PD . If the two oblique lines are on opposite sides of PC , as PE and ...
Side 22
... join EB . Then But OBOE + EB . EB = EA . ... OB < OE + EA , or OB < OA . ( 60 ) ( Ax . 10 ) ( 60 ) Q.E.D. 67. COR . Every point equally distant from the extremities of a straight line lies in the perpendicular bisector of the line . If ...
... join EB . Then But OBOE + EB . EB = EA . ... OB < OE + EA , or OB < OA . ( 60 ) ( Ax . 10 ) ( 60 ) Q.E.D. 67. COR . Every point equally distant from the extremities of a straight line lies in the perpendicular bisector of the line . If ...
Side 38
... Join FF ' which cuts DE at H. A F B D \ IH Because DFDF ' , and EF EF ' , = ( Hyp . ) .. points D and E are equally distant from F and F ' . .. DE is to FF ' at its middle pt . H. ( 67 ) Now revolve the A DEF about DE as an axis till it ...
... Join FF ' which cuts DE at H. A F B D \ IH Because DFDF ' , and EF EF ' , = ( Hyp . ) .. points D and E are equally distant from F and F ' . .. DE is to FF ' at its middle pt . H. ( 67 ) Now revolve the A DEF about DE as an axis till it ...
Side 42
... Join BD . Then , since CD = CB , ... CDB = CBD . ( 111 ) But ext . CDB > opposite int . DAB of △ ADB . ( 98 ) ... also CBD > < DAB . But CBA > < CBD . ( Ax . 8 ) Much more ... CBA > < DAB . Q.E. D. EXERCISES . 1. Prove Prop . 27 by ...
... Join BD . Then , since CD = CB , ... CDB = CBD . ( 111 ) But ext . CDB > opposite int . DAB of △ ADB . ( 98 ) ... also CBD > < DAB . But CBA > < CBD . ( Ax . 8 ) Much more ... CBA > < DAB . Q.E. D. EXERCISES . 1. Prove Prop . 27 by ...
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ELEMENTS OF PLANE & SOLID GEOM Edward a. (Edward Albert) 1845 Bowser Ingen forhåndsvisning tilgjengelig - 2016 |
ELEMENTS OF PLANE & SOLID GEOM Edward a. (Edward Albert) 1845 Bowser Ingen forhåndsvisning tilgjengelig - 2016 |
Vanlige uttrykk og setninger
ABCD adjacent angles altitude angles are equal base bisect bisector called centre chord circumference circumscribed coincide cone of revolution Cons construct cylinder diagonals diameter diedral angle distance divided draw equally distant equilateral triangle equivalent EXERCISES exterior angle faces feet Find the area Find the volume frustum given circle given line given point given straight line homologous homologous sides hypotenuse inches intersection isosceles triangle lateral area lateral edges Let ABC meet middle point number of sides parallel parallelogram parallelopiped perimeter perpendicular plane MN polyedron prism produced Proposition Proposition 13 pyramid quadrilateral radii radius ratio rectangle rectangular parallelopiped regular inscribed regular polygon right angles segment similar slant height sphere spherical polygon spherical triangle square surface symmetrical tangent tetraedron Theorem triangle ABC triangular prism triedral vertex
Populære avsnitt
Side 72 - A circle is a plane figure bounded by a curved line, called the circumference, every point of which is equally distant from a point within called the center.
Side 186 - Two triangles having an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles.
Side 45 - If two triangles have two sides of the one equal respectively to two sides of the other, but the included angle of the first greater than the included angle of the second, then the third side of the first is greater than the third side of the second. Hyp. In A ABC and A'B'C' AB = A'B'; AC = A'C'; ZA>ZA'.
Side 12 - AXIOMS. 1. Things which are equal to the same thing are equal to each other. 2. If equals be added to equals, the sums will be equal.
Side 334 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Side 253 - Equal oblique lines from a point to a plane meet the plane at equal distances from the foot of the perpendicular ; and of two unequal oblique lines the greater meets the plane at the greater distance from the foot of the perpendicular.
Side 378 - The circumferences of the sections made by the planes are called the bases of the zone, and the distance between the planes is the altitude of the zone.
Side 354 - A zone is a portion of the surface of a sphere included between two parallel planes. The circumferences of the sections...
Side 29 - If a straight line meet two straight lines, so as to make the two interior angles on the same side of it taken together less than two right angles...
Side 220 - The areas of two circles are to each other as the squares of their radii. For, if S and S' denote the areas, and R and R