Technical Drawing - Exam Papers - Higher - 1996 - Building
Fig. 2 shows the outline plan and elevation of a roof and a dormer window. The surface B has a pitch of 30° and the surface A has a pitch of 40°. The line of intersection between the surfaces B and C has a true length of 19m. The dihedral angle between the surfaces B and C is 145°. The true angle between the horizontal surface E and the sloping dormer surfaces D and F is 120°.
(a) Draw the given plan and elevation.
(b) Determine the dihedral angle between the surfaces A and B.
Scale 1: 200