Multiple choice question III — task. Mathematics State Board, Class 10.

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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:

$110^\circ$
$120^\circ$
$100^\circ$
$130^\circ$

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