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Answer variants:
70
110
\(90\)
The two tangents from an external points \(P\) to a circle with centre at \(O\) are \(PA\) and \(PB\).
If \(\angle APB = 70^{\circ}\) then the value of \(\angle AOB\) is \(^{\circ}\).
If \(\angle APB = 70^{\circ}\) then the value of \(\angle AOB\) is \(^{\circ}\).
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