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Projection of Lines - Classwork Problem


1. A line AB has its end A 20 mm above the HP and 30 mm in front of VP. The other end B is 60 mm above the HP and 45 mm in front of VP. The distance between end projectors is 70 mm. Draw its projections and determine the true length and apparent inclinations.

2. A line AB 80 mm long has its end A 20 mm above the HP and 30 mm in front of VP. It is inclined at 300 to HP and 450 to VP. Draw the projections of the line and find apparent lengths and apparent inclinations.

3. A line PQ 85 mm long has its end P 10 mm above HP and 15 mm in front of VP. The top view and front view of the line PQ are 75 mm and 80 mm respectively. Draw its projections. Also determine the true and apparent inclinations of the line.

4. A straight line PQ is inclined at 450 to HP and 300 to VP. The point P is in HP and the point Q is in VP. The length of the straight line is 65 mm. Draw the projections of the straight line AB.

5. A line AB 100 mm long measures 80 mm in the front view and 70 mm in the top view, the midpoint M of the line is 40 mm from both HP and VP. Draw its projections. Find its inclinations.


6. A straight line PQ 80 mm long appears to be of length 50 mm and inclined at 300 to XY line in its side view. Draw its projections when its end point P is 15 mm above the HP and 60 mm in front of VP. Point Q is nearer to VP than point P.


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