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5 October, 07:38

Triangle LMN is reflected across a line, L = (12, - 7), and L' = (-7, 12). What is the line of reflection?

(A) the x-axis

(B) the y-axis

(C) the line y = x

(D) the line y = - x

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  1. 5 October, 11:12
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    Answer: C, the line y = x.

    The formula for reflecting across the line y = x is (x, y) - > (y, x). If the original coordinates are (12, - 7), and they become (-7, 12), the x and y values have swapped places, showing a reflection over the line y = x.
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