45. A boy wishes to cut the largest possible square out of a piece of cardboard in the shape of a right triangle,
with legs of 8 inches and 12 inches as shown in figure 45. The side of the square, in inches, is
(A) 4
(B) 5
(C) 4.8
(D) 4.5
(E) 4.3
Fig. 45
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