math project help

Good luck with that. Reason it out!

Given two sides of a triangle, there are relatively obvious limitations on the size of the third side.

Try 2, and 3

Now, let's ponder the 3rd side.
Will 0 make a triangle? No. Greater than that.
Will 1 make a triangle? You tell me.
Will 2 make a triangle? You tell me.
Will 3 make a triangle? You tell me.
Will 4 make a triangle? You tell me.
Will 5 make a triangle? You tell me.
Will 6 make a triangle? No. Less than that.

Hmmm... What's the rule for that?
 
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