Answer:
b = 4
Explanation:
a^2 + b^2 = c^2
a = 3
b = b
c = 5
(3)^2 + b^2 = (5)^2
9 + b^2 = 25
b^2 = 25 - 9
b^2 = 16
√b^2 = √16
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