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What type of triangle has side lengths 12, 13, and 2√3?A. not a triangleB. acuteC. rightD. obtuse
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What type of triangle has side lengths 12, 13, and 2√3?A. not a triangleB. acuteC. rightD. obtuse

User AMA
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A triangle is an obtuse triangle if the square of the the longest side is greater than the sum of squares of the two remaining sides.

User Stefan Wegener
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