Question 915979
5, 6, 11:  


a^2 + b^2 = c^2


5^2 + 6^2 = 11^2


25 + 36 = 121


61 = 121 ... this is false, so 5,6,11 is not a right triangle.


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5, 9, 10:  


a^2 + b^2 = c^2


5^2 + 9^2 = 10^2


25 + 81 = 100


106 = 100 ... this is false, so 5,9,10 is not a right triangle.


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I'll let you handle the others


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Thanks,


Jim