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Technical Drawing  Exam Papers  Higher  1994  BuildingQuestion 2Fig. 2 shows the plan of a pitched roof. The surfaces A, C and D have pitches of 45°, 35° and 55°, respectively. The top surface E is horizontal. The line of intersection between the surfaces B and C has a true inclination of 25° to the horizontal plane and the dihedral angle between the surfaces B and C is 125°. Draw the given plan, project an elevation and determine the dihedral angle between the surfaces A and D. Scale 1: 100 


