Multiple choice question II — task. Mathematics State Board, Class 9.

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1. In the figure, \(O\) is the centre of the circle and \(\angle ACB = 40^\circ\) then \(\angle AOB =\)

\(80^\circ\)
\(70^\circ\)
\(85^\circ\)
\(65^\circ\)

2. In a cyclic quadrilaterals \(ABCD\), \(\angle A = 4x\), \(\angle C = 2x\) the value of \(x\) is:

\(15^\circ\)
\(30^\circ\)
\(25^\circ\)
\(20^\circ\)

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