Practical Geometry and Graphics |
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Page 182
... pyramid . The axis of a prism is the straight line joining the centres of its ends ; and the axis of a pyramid is the straight line joining its vertex to the centre of its base . A right prism has its axis at right angles to its ends ...
... pyramid . The axis of a prism is the straight line joining the centres of its ends ; and the axis of a pyramid is the straight line joining its vertex to the centre of its base . A right prism has its axis at right angles to its ends ...
Page 183
... PYRAMID OBLIQUE HEPTAGONAL PYRAMID . FIG . 323 . FIG . 324 . FIG . 325 . FIG . 326 . A right circular cylinder may also be defined as a solid described by the revolution of a rectangle about one of its sides , which remains stationary ...
... PYRAMID OBLIQUE HEPTAGONAL PYRAMID . FIG . 323 . FIG . 324 . FIG . 325 . FIG . 326 . A right circular cylinder may also be defined as a solid described by the revolution of a rectangle about one of its sides , which remains stationary ...
Page 185
... Pyramid . The projections of a pyramid are simplest when the solid is so placed that its base is parallel to one of the planes of projection , and whatever projections of the pyramid may be required it is generally necessary to first ...
... Pyramid . The projections of a pyramid are simplest when the solid is so placed that its base is parallel to one of the planes of projection , and whatever projections of the pyramid may be required it is generally necessary to first ...
Page 186
... pyramid . These observations are illustrated by Figs . 333 to 336. Fig . 333 shows the plan and elevation of a right square pyramid when its base is horizontal . The plan is first drawn . This plan is a square abcd with its diagonals ...
... pyramid . These observations are illustrated by Figs . 333 to 336. Fig . 333 shows the plan and elevation of a right square pyramid when its base is horizontal . The plan is first drawn . This plan is a square abcd with its diagonals ...
Page 187
... pyramid on a triangular base . Its projections may therefore be drawn as described in the preceding article if its ... pyramids having a common base , the triangular faces being equilateral triangles . Two of the axes of the ...
... pyramid on a triangular base . Its projections may therefore be drawn as described in the preceding article if its ... pyramids having a common base , the triangular faces being equilateral triangles . Two of the axes of the ...
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Common terms and phrases
a₁ ABCD asymptotes axes bisects centre line chord conic construction crank cylinder described determined diagram distance Draw the plan Draw the traces drawn edge ellipse epicycloid epitrochoid equal equation face figure fixed forces given circle given in Fig given plane given point ground line helix horizontal plane horizontal trace hyperbola hyperboloid hypocycloid hypotrochoid inches inches in diameter inches long inches side inclined at 45 isometric projection meet moulding parabola parallel to XY picture plane plan and elevation plane containing plane of projection plane of section plane parallel position prism pyramid r₁ radius rays of light Referring to Fig right angles right circular cone rolling circle semi-minor axis shown in Fig shows simple harmonic motion solid sphere square straight line surface of revolution tangent plane tracing paper triangle vector velocity vertex vertical plane vertical trace