## Orthographic projection: the elementary principles of orthographic projection, with their applications to technical drawing |

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1st angle 2nd angle 3rd angle 3rd quadrants 4th angle angle of 6o0 axis perpendicular Axonometric Projection circle coincides construct the front construct the side construct the top cylinder Descriptive Geometry dihedral angles equal in length front view frustrum given altitude given diameter graphic Projection hence hexagon horizontal and vertical horizontal plane isometric projection jection lateral edges left side view line in space line is parallel lines drawn object oblique to H obtain the projections obtain the revolved Obtain the top Obtain the usual orthographic projection parallel to G. L. parallel to H parallelopiped pendicular perpen perpendicular to H planes of projection position be given prism Problem 39 profile plane profile projection project the points projecting lines Revolve the line revolved position right side view technical drawing tion top and front top view true length usual three views vertical plane vertical projection vertical trace view of Fig volved wedge