Elements of Geometry and Trigonometry: From the Works of A.M. Legendre |
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Page 148
... becomes less than any finite magnitude , are ultimately equal . For if they are not ultimately equal , let D be their ultimate difference . Now , by hypothesis , the quantities have approached nearer to equality than any given quantity ...
... becomes less than any finite magnitude , are ultimately equal . For if they are not ultimately equal , let D be their ultimate difference . Now , by hypothesis , the quantities have approached nearer to equality than any given quantity ...
Page 149
... become ultimately equal . But this equality cannot take place for any finite number of sides ; hence , the number of sides in each will be infinité , and each will coincide with the circle , which is their common limit . Under this ...
... become ultimately equal . But this equality cannot take place for any finite number of sides ; hence , the number of sides in each will be infinité , and each will coincide with the circle , which is their common limit . Under this ...
Page 197
... becomes , 1 : vol . AG whence , :: 1 : AB × AD × AE ; vol . AG = AB × AD × AE . Hence , the volume of any rectangular parallelopipedon is equal to the product of its three dimensions ; that is , the number of times which it contains the ...
... becomes , 1 : vol . AG whence , :: 1 : AB × AD × AE ; vol . AG = AB × AD × AE . Hence , the volume of any rectangular parallelopipedon is equal to the product of its three dimensions ; that is , the number of times which it contains the ...
Page 220
... the frustum of the pyramid coincides with the frustum of the cone , its bases with the bases of the cone , the three pyramids become cones , and their altitudes are equal to that of the frustum ; hence , 220 GEOMETRY .
... the frustum of the pyramid coincides with the frustum of the cone , its bases with the bases of the cone , the three pyramids become cones , and their altitudes are equal to that of the frustum ; hence , 220 GEOMETRY .
Page 56
... becomes equal to 90 ° , when the sine becomes equal to +1 , which is its greatest possible value ; as the arc increases from 90 ° , the sine goes on diminishing until the arc becomes equal to 180 ° , when the sine becomes equal to +0 ...
... becomes equal to 90 ° , when the sine becomes equal to +1 , which is its greatest possible value ; as the arc increases from 90 ° , the sine goes on diminishing until the arc becomes equal to 180 ° , when the sine becomes equal to +0 ...
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Common terms and phrases
AB² ABCD AC² adjacent angles altitude apothem Applying logarithms base and altitude bisect centre chord circle circumference circumscribed coincide cone consequently convex surface corresponding cosec cosine Cotang cylinder denote diagonals diameter difference distance divided draw drawn edges equally distant feet find the area Formula frustum given angle given straight line greater hence homologous hypothenuse included angle interior angles intersection less Let ABC log sin lower base mantissa measured by half number of sides opposite parallel parallelogram parallelopipedon perimeter perpendicular plane MN polyedral angle polyedron prism PROPOSITION proved pyramid quadrant radii radius rectangle regular polygons right angles right-angled triangle Scholium secant segment semi-circumference side BC similar sine slant height sphere spherical polygon spherical triangle square subtracted Tang tangent THEOREM triangle ABC triangular prisms triedral angle upper base vertex vertices whence
Popular passages
Page 126 - The square of the hypothenuse is equal to the sum of the squares of the other two sides ; as, 5033 402+302.
Page 59 - A'B'C', and applying the law of cosines, we have cos a' = cos b' cos c' + sin b' sin c' cos A'. Remembering the relations a' = 180° -A, b' = 180° - B, etc. (this expression becomes cos A = — cos B cos C + sin B sin C cos a.
Page 18 - The circumference of every circle is supposed to be divided into 360 equal parts called degrees, and each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds, and these into thirds, fourths, &c.
Page 104 - The square described on the hypothenuse of a rightangled triangle is equal to the sum of the squares described on the other two sides.
Page 6 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Page 28 - If two triangles have two sides of the one equal to two sides of the...
Page 46 - 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.
Page 99 - The area of a parallelogram is equal to the product of its base and altitude.
Page 172 - If two planes are perpendicular to 'each other, a straight line drawn in one of them, perpendicular to their intersection, will be perpendicular to the other.
Page 214 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.