In figure angle AOB =

An angle which measures more than 0^o and less than 90^o is called

Each  angle of a square is of measure

At 6 o' clock the angle formed between the hands of a clock is

179^o is an example of

Number of right angles formed in the given figure is

Number of rays that can be drawn from a given point is

 Four sided regular polygon with one angle 90^o is called

An angle which measures 90^o is called