Technical Drawing - Exam Papers - Higher - 1997 - Paper 1

Question 7

Full Scale PDF of Answer   Solidworks Solid Model of Object(Part a)   Solidworks Solid Model of Object(Part b)

Fig. 5 shows the plan and elevation of a regular tetrahedron of 90mm side. The tetrahedron has been cut by an oblique plane as shown.

The true length of the edge DF is 57mm and the cut surface DEF is inclined at 40° to the horizontal plane.

(a) Draw the given plan and elevation.

(b) On a separate diagram, draw a plan and elevation of the complete tetrahedron when the corner C rests on the horizontal plane and the corners A and B are 20mm and 60mm, respectively, above the horizontal plane.

Show Full Answer