Question 200177
can you please help me? 
Which of the lists of three lengths cannot form a triangle? 
a. 2, 2, 5
b. 2, 5, 5
c. 2, 2, 2
d. 5, 5, 5 
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It's a.  The side that's 5 is more than the sum of 2 and 2, so if they're end to end, they can't connect to the ends of the side that's 5.
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