In Centesimal system, an angle is measured in grades, minutes and seconds. In this 

system, a right angle is divided into 100 equal parts and each subpart is called a grade (

1^g ). 

Again, a grade is divided into 100 equal parts and each subpart is called a Centesimal 

minutes (1`) and a minute is further subdivided into 100 equal parts, each of which is 

called a Centesimal Seconds (1" ). 

Ex: 

1 right angle = 100 grades 

I grade = 100 minutes

I minute = 100 seconds