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A regular rhombic bi-pyramid is placed in projection planes such that one of its longest diagonal is perpendicular to vertical plane the front view will be ____________

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A regular rhombic bi-pyramid is placed in projection planes such that one of its longest diagonal is perpendicular to vertical plane the front view will be  ____________

(a) square

(b) rhombus

(c) triangle

(d) rectangle

I had been asked this question in final exam.

The origin of the question is Problems on Orthographic Projection topic in division Loci of Points & Orthographic Projections of Engineering Drawing

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Right answer is (b) rhombus

For explanation I would say: Given a regular rhombic bi-pyramid is placed in projection planes such that one of its longest diagonal is perpendicular to a vertical plane. As per position given the front view and side view will be rhombus and top view will be square.

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