Asked by Anonymous

perimeter of a triangle is 18 cm, what is the length of its longest side??
Answered by drwls
More information is needed to answer that.
Answered by Steve
However, we do know that the other two sides must add up to something more than 9. So, the longest side must be less than 9. Also, it cannot be less than 6.

So, somewhere between 6 and 9.
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