Amy had a pack of straws and was trying to make a triangle. She cut the straws so that two of the pieces were 5 inches and 7 inches. What is the range of lengths needed for the third straw for Amy to make a triangle? Explain your answer.
Added by Lu-S G.
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So, if Amy already has two straws of lengths 5 inches and 7 inches, the third straw must be: Show more…
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