One leg of an isosceles right triangle measures 5 inches. Rounded to the nearest tenth, what is the approximate length of the hypotenuse?

In an isosceles right triangle, the two legs are equal, and the hypotenuse is a leg multiplied by √2. So the hypotenuse is 5√2 ≈ 5 × 1.414 = 7.07 inches, which rounds to 7.1 inches. The correct choice is C, 7.1 inches.

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