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UGC-NET | UGC NET CS 2014 Dec – III | Question 16

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Consider a triangle represented by A(0, 0), B(1, 1), C(5, 2). The triangle is rotated by 45 degrees about a point P(–1, –1). The co-ordinates of the new triangle obtained after rotation shall be _______
(A) A'(-1, √2 – 1), B'(-1, 2√2 – 1), C'(3 / 2(√2 – 1), 9 / 2(√2 – 1),)
(B) A'( √2 – 1, -1), B'(2√2 – 1, -1, ), C'(3 / 2(√2 – 1), 9 / 2(√2 – 1),)
(C) A'(-1, √2 – 1), B'(2√2 – 1, -1, ),, C'(3 / 2(√2 – 1), 9 / 2(√2 – 1),)
(D) A'(-1, √2 – 1), B'(2√2 – 1, -1, ), C'(9 / 2(√2 – 1), 3 / 2(√2 – 1),)


Answer: (A)

Explanation:

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Last Updated : 27 Jun, 2018
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