Suppose we have a map with North, South, East, West Map
If we move from
We have rotated ‘right angle’ in clockwise direction.
We see that
We have rotated 1/4 of the full turn.
So, right angle is 1/4 of the full rotation
If we go from
East to South
We have rotated right angle in clockwise direction
Now, if we go from
South to North clockwise
We have rotated 1/2 revolutions.
This is straight angle .
2 right angle = 1 straight angle
If we go from East to West Clockwise
Then we have rotated 1/2 revolution
i.e. we have rotated
1 straight angle
We go from North to North
In this case,
we have rotated 1 revolution
∴ we have rotated 1 full angle