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The nature of surface of sphere is ______________(a) plane surface(b) singly curved surface(c) singly or doubly curved surface(d) doubly curved surfaceThis question was posed to me in an online quiz.I need to ask this question from Development of Surfaces topic in portion Development of Surfaces, Isometric Projections, Perspective Projections & Transformation of Projections of Civil Engineering Drawing

Answer»

Correct choice is (d) doubly curved surface

Easiest EXPLANATION: Double-curved SURFACES, such as a sphere do not produce true developments, because they do not CONTAIN any straight LINES.



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