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GATE CSE 2023 Q10: Rotation then reflection taking star P to Q to R

Question

Which one of the options best describes the transformation of the 2-dimensional figure P to Q, and then to R, as shown?

An irregular five-pointed star P with one long point towards the upper right; Operation 1 turns it into star Q with the long point towards the lower right; Operation 2 turns Q into star R with the long point towards the upper right
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Try it: multiple choice: exactly one correct option

Select one option
Wrong answer costs 2/3 mark in GATE.
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Answer: A (official GATE 2023 final answer key)

Concept used: Tracking a distinctive feature of a figure through rotations and reflections.

First step: Follow the long point of the star: see where it moves from P to Q, then from Q to R.

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Source: official GATE 2023 CS question paper and final answer key, organised by IIT Kanpur. Question paper · Answer key

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