Elements of Geometry and Trigonometry |
From inside the book
Results 1-5 of 37
Page viii
... Pyramid , - 359 Convex Surface of the Frustum of a Right Pyramid ,. 359 Solidity of a Prism , ... 359 Solidity of a Pyramid ,. 360 Solidity of the Frustum of a Pyramid ,. 360 The Wedge , .. - 361 Rectangular Prismoid ,. 361 Solidity of ...
... Pyramid , - 359 Convex Surface of the Frustum of a Right Pyramid ,. 359 Solidity of a Prism , ... 359 Solidity of a Pyramid ,. 360 Solidity of the Frustum of a Pyramid ,. 360 The Wedge , .. - 361 Rectangular Prismoid ,. 361 Solidity of ...
Page 175
... pyramid is the perpendicular let fall from the vertex on the plane of the base . 11. A RIGHT PYRAMID is one whose base is a regular polygon , and in which the perpendicular let fall from the vertex upon the base passes through the ...
... pyramid is the perpendicular let fall from the vertex on the plane of the base . 11. A RIGHT PYRAMID is one whose base is a regular polygon , and in which the perpendicular let fall from the vertex upon the base passes through the ...
Page 176
... pyramid intercepted between the bases of the frustum . 15. The diagonal of a polyedron is a line joining the vertices of any two of its angles , not in the same face . 16. Similar polyedrons are those whose polyedral , angles are equal ...
... pyramid intercepted between the bases of the frustum . 15. The diagonal of a polyedron is a line joining the vertices of any two of its angles , not in the same face . 16. Similar polyedrons are those whose polyedral , angles are equal ...
Page 177
... pyramid be cut by a plane parallel to its base : 1st . The edges and the altitude will be divided proportionally : 2d . The section will be a polygon similar to the base . Let the pyramid S - ABCDE , of which SO is the altitude , be cut ...
... pyramid be cut by a plane parallel to its base : 1st . The edges and the altitude will be divided proportionally : 2d . The section will be a polygon similar to the base . Let the pyramid S - ABCDE , of which SO is the altitude , be cut ...
Page 178
... pyramids , having a common vertex and their bases in the same plane ; if these pyramids are cut by a plane parallel to the plane of their bases , the sections , abcde , xyz , will be to each other as the bases ABCDE , XYZ . A E D C Χ ...
... pyramids , having a common vertex and their bases in the same plane ; if these pyramids are cut by a plane parallel to the plane of their bases , the sections , abcde , xyz , will be to each other as the bases ABCDE , XYZ . A E D C Χ ...
Other editions - View all
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
adjacent angles altitude angle ACB angle BAD bisect centre chord circ circumference circumscribed common comp cone consequently convex surface cosē Cosine Cosine D Cotang cylinder diagonal diameter distance divided draw drawn equations equivalent feet figure find the area frustum given angle given line gles greater hence homologous homologous sides hypothenuse included angle inscribed circle intersect less Let ABC let fall logarithm magnitudes measured by half middle point number of sides opposite parallel parallelogram parallelopipedon pendicular perimeter perpendicular plane MN polyedral angle polyedron PROBLEM PROPOSITION pyramid quadrant radii radius ratio rectangle regular polygon right angles right-angled triangle Scholium secant segment side BC similar sinē sine slant height solidity sphere spherical polygon spherical triangle square described straight line Tang tangent THEOREM triangle ABC triangular prism triedral angles vertex vertices ΙΟ
Popular passages
Page 24 - 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.
Page 38 - That, if a straight line falling on two straight lines make the interior angles on the same side less than two right angles, the two straight lines, if produced indefinitely, meet on that side on which are the angles less than the two right angles.
Page 227 - A spherical triangle is a portion of the surface of a sphere, bounded by three arcs of great circles.
Page 271 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees...
Page 43 - Hence, the interior angles plus four right angles, is equal to twice as many right angles as the polygon has sides, and consequently, equal to the sum of the interior angles plus the sum of the exterior angles.
Page 215 - The surface of a sphere is equal to the product of its diameter by the circumference of a great circle.
Page 107 - If two triangles have two angles of the one equal to two angles of the other, each to each, and also one side of the one equal to the corresponding side of the other, the triangles are congruent.
Page 93 - The area of a parallelogram is equal to the product of its base and altitude.
Page 231 - The angles of spherical triangles may be compared together, by means of the arcs of great circles described from their vertices as poles and included between their sides : hence it is easy to make an angle of this kind equal to a given angle.
Page 232 - F, be respectively poles of the sides BC, AC, AB. For, the point A being the pole of the arc EF, the distance AE is a 'quadrant ; the point C being the pole of the arc DE, the distance CE is likewise a quadrant : hence the point E is...