1. Sexagesimal System - degree
2. Circular (Natural) System - radian
3. Mil System - mil
4. Grade System - grade
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the concept of lines and angles r used in our daily life. straight lines are in class rooms on the floor, door,window,zebra crossing on road side. where as angles are used in building constructions,inter connected with subjects like physics chemistry etc.types of angles are used in yoga position , games fields and so on
1. it useful in geometry 2. used for drawing a straight line It's used for drawing 30, 60 and 90 degree angles. There is also a version for 45 degree angles.
beacues stone cold said so
Measuring a lawn Calculating the speed of a falling object
This is a 21 sided polygon and therefore has 21 angles. NOTE : The name supplied for this polygon is an artificial name and never used in practice. General usage refers to this shape as a 21-gon.