Right triangle and side lengths
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Since a right triangle satisfies the formula a² + b² = c², C is your answer because
√2 could be a and 2 could be b
(√2)² + 2² = c²
2 + 4 = c²
6 = c²
√6 = c
Since option C only works with this formula, C. √2, 2, √6 is the answer.