Chapter 8 - Geometry - 8.8 Pythagorean Theorem - 8.8 Exercises - Page 592: 32

Hypotenuse of the triangle is $\approx 5.9$ mi.

Let $H =$ hypotenuse of the triangle $a^{2} + b^{2} = c^{2}$ $4.2^{2} + 4.2^{2} = H^{2}$ $17.64 + 17.64 = H^{2}$ $35.28 = H^{2}$ $H = \sqrt 35.28$ $H = 5.939...$ $H \approx 5.9$ mi