Answer:
by pythagoras theorem
9² = 8² + x²
x² = 81 - 64
x² = 17
x = root 17
option A
A,
Explanation:
a^2 + b^2 = c^2
8^2 + b^2 = 9^2
64 + b^2 = 81
b^2 = 17
b =
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