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Orthographic Projection of Points and Lines
Technical Drawing Applications · Chapter 9 · 6. Orthographic projections
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- Planes of projection, reference line and quadrants; first-angle and third-angle methods
- Projections of points in the first and third quadrants and on a reference plane
- Lines parallel to both planes; parallel to one plane and perpendicular to the other
- Lines inclined to one plane and parallel to the other; lines inclined to both planes
- Finding the true length of a line from its projections