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Answer: 12^2
Explanation:
The formula for the Pythagorean Theorem is a^2+b^2=c^2We are given a & c.
9^2 + b^2 = 12^2
12^2 = 255
9^2 = 81
225 - 81 = 144
= 12
Therefore 12^2 is your correct answer.