Answer:
The answer to your question is: AC = 126
Explanation:
Use the Thales' theorem
9(140 - x) = 81x
1260 - 9x = 81x
1260 = 81x + 9x
1260 = 90x
x = 1260/90
x = 14
AC = 140 - 14
AC = 126
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