Question

if both front view and top view line are perpendicular to the reference line ,the true inclination of the line with hp and vp may be respectively​

Answer 1

Answer:

When a plane is perpendicular to a reference plane, its projection on that plane shows its true shape and size. Explanation: When a plane is perpendicular to a reference plane, its projection on that plane is a straight line.

Answer 2

• The meaning of HP is horizontal plane w.r.t to reference line in engineering sketches.

• The meaning of VP is vertical plane w.r.t to reference line in engineering sketches.

• If they are both perpendicular to each other that means that the sum of the angles between the HP and reference line and VP and the reference line is 90 degrees.
• Thus the true inclination of HP and VP can be 80 degrees and 10 degrees, 60 degrees and 30 degrees, 75 degrees and 15 degrees or any other option that sums upto 90 degrees.