Projection of planes 008

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Projection of planes 008

  1. 1. Problem 5: Read problem and answer following questions A regular pentagon of 30 mm sides is resting 1. Surface inclined to which plane? ------- HP on HP on one of it’s sides while it’s opposite 2. Assumption for initial position? ------ // to HP vertex (corner) is 30 mm above HP. 3. So which view will show True shape? --- TV Draw projections when side in HP is 300 4. Which side will be vertical? --------any side. inclined to VP. Hence begin with TV,draw pentagon below SURFACE INCLINATION INDIRECTLY GIVEN X-Y line, taking one side vertical. SIDE INCLINATION DIRECTLY GIVEN: ONLY CHANGE is the manner in which surface inclination is described: One side on Hp & it’s opposite corner 30 mm above Hp. d’ d’1Hence redraw 1st Fv as a 2nd Fv making above arrangement. Keep a’b’ on xy & d’ 30 mm above xy. c’e’ e’1 30 c’1 b’ a’ c’e’ d’ X Y b’ a’ 300 b’1 a’1 e e1 b1 a a1 c1 a1 d d1 b b1 d1 e1 c c1

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