Solution
The reflection is a rigid transformation. This does not affect the length of a line segment.
Therefore, the line segments are equal.
Hence, LM = L'M'
Thank you. :)
I won't tell you the answer but I'll tell you how to do it
first, find the area of the rectangle (lxw)
Next, find area of the triangle (BxHx.5)
Then, subtract the area of the rectangle to the area of the triangle
The answer is b. There is a proof, but it is easily got by proving the other cases wrong.

<u>Answer</u><u>:</u>
x = -6 or x = 2
Hope you could get an idea from here.
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