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Which of the following properties are preserved in affine transformation?(a) co-linearity(b) convexity(c) concavity(d) parallelismI had been asked this question in semester exam.My enquiry is from Transformations between Coordinate Systems and Affine Transformations in division 2D Transformation and Viewing of Computer Graphics

Answer»

The correct answer is (c) concavity

For explanation I would say: The col-linearity, convexity and PARALLELISM of bunch of points are conserved in AFFINE transformations but any 3 or more points which are CONCAVE can TURN parallel, so we can say concavity is not conserved.



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