Technical Drawing - Exam Papers - Higher - 1992 - Paper 1

Question 5

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A regular tetrahedron of 120mm side has one edge resting on the horizontal plane and one face inclined at 30° to the horizontal plane as shown in plan and elevation in Fig 4. Also shown are the projections of an equilateral triangular prism of 65mm side which penetrates the tetrahedron.
Draw the projections of the solids showing all lines of interpenetration.
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