A cyclic rhombus is a

A cyclic parallelogram is a

The angle subtended by a semi-circle at its centre is

In the given figure, ‘O’ is the centre of the circle and $OP\perp AB\mathrm{.}OP\; \backslash perp\; AB.$ If AP = 6 cm, then AB =

How many circles can be drawn through three non-collinear points?

In the given figure, arc AB = arc CD and if $\mathrm{\angle }AOB=40^{\circ }\backslash angle\; AOB=40^\backslash circ$, then $\mathrm{\angle }COD\backslash angle\; COD$=

In the given figure, ‘O’ is the centre of the circle. If $\mathrm{\angle }ACB=35^{\circ }\backslash angle\; ACB=35^\backslash circ$, then $\mathrm{\angle }AOB\backslash angle\; AOB$ =

Angle made by diameter in a semi-circle is

If the length of the longest chord in a circle is 24 cm then it’s radius is ……

Two circles having radii 12 cm and 5 cm touches externally then the distance between the centres of two circles is……