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a^2 + b^2 = c^2
2.4^2 + b^2 = 2.5^2
b^2 = 6.25 - 5.76
b^2 = 0.49
b = 0.7
2.4^2 + b^2 = 2.5^2
b^2 = 6.25 - 5.76
b^2 = 0.49
b = 0.7