Elements of Geometry and Trigonometry |
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Page 177
Adrien Marie Legendre Charles Davies. to SB , and from E draw in the faces DTE and FTE , the lines ED and EF , respectively perpendicular to TE ; then will the angle DEF measure the inclination of these faces . Draw AC and DF The right ...
Adrien Marie Legendre Charles Davies. to SB , and from E draw in the faces DTE and FTE , the lines ED and EF , respectively perpendicular to TE ; then will the angle DEF measure the inclination of these faces . Draw AC and DF The right ...
Page 178
... faces of the polyedron ; the lines in which the polyedrons meet , are called edges of the polyedron ; the points in which the edges meet , are called vertices of the polyedron . 2. A PRISM is a polyedron , two of whose faces are equal ...
... faces of the polyedron ; the lines in which the polyedrons meet , are called edges of the polyedron ; the points in which the edges meet , are called vertices of the polyedron . 2. A PRISM is a polyedron , two of whose faces are equal ...
Page 179
... faces are rect- angles ; a cube is a rectangular parallelo- pipedon , all of whose faces are squares . 8. A PYRAMID is a polyedron bounded by a polygon called the base , and by tri- angles meeting at a common point , called the vertex ...
... faces are rect- angles ; a cube is a rectangular parallelo- pipedon , all of whose faces are squares . 8. A PYRAMID is a polyedron bounded by a polygon called the base , and by tri- angles meeting at a common point , called the vertex ...
Page 180
... faces , edges , or angles , are called homologous . 17. A DIAGONAL of a polyedron , is a straight line join- ing the vertices of two polyedral angles not in the same face . 18. The VOLUME OF A POLYEDRON is its numerical value 180 GEOMETRY .
... faces , edges , or angles , are called homologous . 17. A DIAGONAL of a polyedron , is a straight line join- ing the vertices of two polyedral angles not in the same face . 18. The VOLUME OF A POLYEDRON is its numerical value 180 GEOMETRY .
Page 185
... faces , or the convex sur- face of the pyramid , is equal to , ( AB + BC + CD + DE + EA ) × † SF ; which was to be proved . Scholium . The convex surface of a frustum of a right pyramid is equal to half the sum of the perimeters of its ...
... faces , or the convex sur- face of the pyramid , is equal to , ( AB + BC + CD + DE + EA ) × † SF ; which was to be proved . Scholium . The convex surface of a frustum of a right pyramid is equal to half the sum of the perimeters of its ...
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Elements of Geometry and Trigonometry: From the Works of A. M. Legendre Adrien Marie Legendre,Charles Davies No preview available - 2016 |
Common terms and phrases
AB² ABCD AC² adjacent angles altitude angle ACB apothem Applying logarithms base and altitude centre chord circle circumference circumscribed coincide cone consequently convex surface corresponding cosec Cosine Cotang cylinder denote diameter distance divided draw drawn edges equally distant feet find the area Formula frustum given angle given line greater hence homologous hypothenuse included angle interior angles intersection less Let ABC log sin logarithm lower base mantissa mean proportional 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 polygon right-angled triangle Scholium secant segment semi-circumference side BC similar Sine slant height sphere spherical angle spherical polygon spherical triangle square straight line Tang tangent THEOREM triangle ABC triangular prisms upper base vertex vertices whence
Popular passages
Page 28 - If two triangles have two sides of the one equal to two sides of the...
Page 100 - The area of a triangle is equal to half the product of its base by its altitude.
Page 99 - The area of a parallelogram is equal to the product of its base and its height: A = bx h.
Page 59 - A chord is a straight line joining the extremities of an arc.
Page 124 - If two polygons are composed of the same number of triangles, similar each to each and similarly placed, the polygons are similar.
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.
Page 43 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
Page 52 - If the product of two quantities is equal to the product of two other quantities, two of them may be made the extremes, and the other two the means of a proportion.
Page 123 - Similar triangles are to each other as the squares of their homologous sides.
Page 182 - The upper end of the frustum of a pyramid or cone is called the upper base...