Problem 4.9 Projection of Straight Lines

Problem 4.9 Projection of Straight Lines – A line PQ contains a point O on it such that the ratio of the distance of the PO: OQ is 1:2. The end P is 20 mm above H.P. and it is in 1st quadrant. And the other end Q is in V.P. The point O is 35 mm above H.P. The line is inclined with the H.P. at an angle 30°. The elevation length of the line PQ is 70 mm. Draw the projections of the line PQ.









Problem 4.5 Projection of Straight Lines

Problem 4.5 Projection of Straight Lines – A line PQR, 80 mm long, is inclined to H.P. by 300 and V.P. by 450. PQ:QR :1:3. Point Q is in V.P. and 20 mm above H.P. Draw the projection of the line PQR when the point R is in the 1st quadrant. Find the position of the point P.



Problem 4.4 Projection of Straight Lines

Problem 4.4 Projection of Straight Lines – The top view and the front view of the line EF, measures 60 mm and 50 mm respectively. The line is inclined to HP and VP by 30 degree and 45 degree, respectively. The end E is on the HP and 10 mm in front of VP. Other end F is in the 1st quadrant. Draw the projections of the line EF and find its true length.