In the given figure, O is the centre of the circle. \(\angle \text{CBE} = 25^\circ\) and \(\angle \text{DEA} = 60^\circ\). Find the measurement of \(\angle \text{ADB} :\)
In the adjoining figure, area of parallelogram ABCD is :
The side BC of \(\triangle \text{ABC}\) is produced to point D. The bisectors of \(\angle \text{ABC}\) and \(\angle \text{ACD}\) meet at a point E. If \(\angle \text{BAC} = 68^\circ\), then the measure of \(\angle \text{BEC}\) is :
ABCD is a quadrilateral in which AD = BC and \(\angle \text{DAB} = \angle \text{CBA}\). If \(\angle \text{CAB} = 30^\circ\), then the measure of \(\angle \text{AOB}\) is :