Which set of values could be the side lengths of a 30-60-90 triangle?
A. {4,4 13.8)
B. {4,4,7,8,12)
C. {4,423,83)
D. {4,412,8}

the answer is (4,3)

since the rule for r0, 90º is (-y,x) and it was already applied to form the image, all you have to do is reverse the answer using this formula.

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