Answer:
It's not a right triangle, because already 7^2 = 7x7 which is 49 so...
Explanation:
Not a right triangle. See below for my reasoning.
If this is a right triangle, then the sum of the squares of the two shorter sides will equal the square of the longest side: 7^2 + 9^2 = 11^2 => 49 + 81 = 121 But this is false.
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