Express each of the following angles in degrees.
(i) 
(ii) 
(iii) 
(iv) -4
(i) Formula : Angle in degrees = 
Therefore, Angle in degrees = 
(ii) Formula : Angle in degrees = 
Therefore, Angle in degrees = 
(iii) Formula : Angle in degrees = 
The angle in minutes = Decimal of angle in radian x 60.’
The angle in seconds = Decimal of angle in minutes x 60.’’
Therefore, Angle in degrees = 
Angle in minutes = 
Angle in seconds = 
Final angle = 
( iv ) Formula : Angle in degrees = 
The angle in minutes = Decimal of angle in radian x 60.’
The angle in seconds = Decimal of angle in minutes x 60.’’
Therefore, Angle in degrees = 
Angle in minutes = 
Angle in seconds = 
Final angle = 
1