Calculate $\angle \mathrm{CDB}.$

 

Calculate $\angle \mathrm{ABC}.$

Calculate:

$\angle \mathrm{ACB}.$

In the figure, given below, $\mathrm{ABCD}$is a cyclic quadrilateral in which $\angle \mathrm{BAD}=75°;\angle \mathrm{ABD}$ $=58°$ and $\angle \mathrm{ADC}=77°.$ Find :

 $\angle \mathrm{BDC},$

In the figure, given below, $\mathrm{ABCD}$is a cyclic quadrilateral in which $\angle \mathrm{BAD}=75°;\angle \mathrm{ABD}$ $=58°$ and $\angle \mathrm{ADC}=77°.$ Find :

 $\angle \mathrm{BCD},$

In the figure, given below, $\mathrm{ABCD}$is a cyclic quadrilateral in which $\angle \mathrm{BAD}=75°;\angle \mathrm{ABD}$ $=58°$ and $\angle \mathrm{ADC}=77°.$ Find :

 $\angle \mathrm{BCA}.$

In the following figure, $\mathrm{O}$ is centre of the circle and $\mathrm{\Delta ABC}$ is equilateral. Find $\angle \mathrm{ADB}.$

In the following figure, $\mathrm{O}$ is centre of the circle and $\mathrm{\Delta ABC}$ is equilateral.

$\angle \mathrm{AEB}.$