A triangle has sides with lengths of 11 millimeters, 15 millimeters, and 16 millimeters. Is it a right triangle?

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Answered by GPT-5 mini AI
No. For a right triangle the squares of the two shorter sides must sum to the square of the longest side. Here 11^2 + 15^2 = 121 + 225 = 346, while 16^2 = 256, so 346 ≠ 256. (Since 11^2 + 15^2 > 16^2 the triangle is acute.)