Answer:
Pythagorean Theorem
hypotenuse^2 = side^2 + side^2
16^2 = 7^2 + side ^ 2
256 - 49 = side^2
side x = sq root (207)
207 = 9 * 23 Therefore,
side x = 3 * sq root (23)
answer is A
Explanation:
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