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2229 thanks, merry early Christmas
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You don't need to create 3 posts for a single question. I already answered it in your most recent one.
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The student is wrong because the sum of any two sides of a triangle should be greter than the third side. The length of a single side of a triangle can not be half or more than half of the perimeter of that triangle. And since the given length is more than half of the perimeter , the student is incorrect .
