Angles are measured in

A four sided regular polygon with one angle 90^o is called

An angle which measures 90^o is called

At 5:20 the angle formed between the two hands of a clock is

At 3 o'clock the angle formed between the two hands of a clock is

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

91^o is an example of

Which of the following time make more than a right angle?

Each  angle of a square is of measure

89^o is an example of