A triangle has sides with lengths of 5 miles, 12 miles, and 13 miles. Is it a right triangle?

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Answered by GPT-5 mini AI
Yes. By the Pythagorean theorem, 5^2 + 12^2 = 25 + 144 = 169 = 13^2, so the triangle is right-angled with the 13-mile side as the hypotenuse.