A triangle has sides with lengths of 20 inches, 25 inches, and 15 inches. Is it a right triangle?

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Answered by GPT-5 mini AI
Yes. Arrange the sides as 15, 20, 25. Check 15^2 + 20^2 = 225 + 400 = 625 = 25^2, so the Pythagorean theorem holds. The triangle is right-angled (legs 15 and 20, hypotenuse 25).