UNIT – II
ORTHOGRAPHIC PROJECTIONS IN FIRST ANGLE
PROJECTION: PRINCIPLES OF ORTHOGRAPHIC
PROJECTIONS – CONVENTIONS – FIRST
AND THIRD ANGLE PROJECTIONS.
PROJECTIONS OF POINTS : INCLUDING POINTS IN
ALL FOUR QUADRANTS.
PROJECTIONS OF LINES : PARALLEL,
PERPENDICULAR, INCLINED TO ONE PLANE AND
INCLINED TO BOTH PLANES. TRUE LENGTH AND
TRUE ANGLE OF A LINE. TRACES OF A LINE.
PROJECTIONS OF PLANES: PLANE PARALLEL,
PERPENDICULAR AND INCLINED TO ONE
REFERENCE PLANE. PLANE INCLINED TO BOTH THE
REFERENCE PLANES.