Answer:
No, it is not a right triangle
Explanation:
You want to know if a triangle with sides 4, 6, and 8 miles is a right triangle.
Right triangle
The side lengths of a right triangle will satisfy the Pythagorean theorem:
c² = a² +b²
8² = 4² +6²
64 = 16 + 36
64 = 52 . . . . . . . . false; not a right triangle
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Additional comment
The attachment shows the triangle is an obtuse triangle.
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