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Please help me it’s super easy. Based on the given information, which conjecture is invalid?

Given: a rectangle has a perimeter of 24 inches

Please help me it’s super easy. Based on the given information, which conjecture is-example-1

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The conjecture that would be incorrect is the third conjecture "The rectangle has a length of 12." The perimeter is the sum of all the sides, and if 2 of the sides are 12, that means that half of the perimeter is already 24, which means that the other 2 sides would have to be 0, which is impossible.

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