What is the mapping rule for a 180° rotation?(x, y) → (y, x)(x, y) → (–y, x)(x, y) → (y, –x)→→→(x, y) → (–x, –y)←←←Answer is D :)
Question
Answer:
(x, y) → (y, x) is for reflection about line y=x.(x, y) → (–y, x) is for 90 deg. counterclockwise rotation (or 270 clockwise)
(x, y) → (y, –x) is for 270 deg. counterclockwise rotation (or 90 clockwise)
(x, y) → (–x, –y) is correct for 180 deg. rotation (clockwise or counterwise)
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general
9 months ago
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