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Two reasons. Divisibility was important to ancient mathematicians. 360 is divisible by all numbers to 10, other than 7; plus a lot more larger numbers. The second is that the earth took just around 360 days to orbit the sun.
From a high level of divisibility we have now moved to a situation where, in advanced mathematics, the measure of one full turn is 2*pi, not even a rational number.
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What is the degrees of a one and a half full turn?
It is 1.5*360 = 540 degrees
How many degrees are there in a one-half turn?
180, because a full circle is 360 degrees. 360-180=180
How many right angles are there in one full turn?
In one full turn, which is 360 degrees, there are exactly four right angles. Each right angle measures 90 degrees, so when you multiply 90 degrees by 4, you get 360 degrees. Therefore, one full turn encompasses four right angles.
What is one fourth part of the circle?
It is 90 degrees of the circle's circumference which has a full turn of 360 degrees.
What is at 180 degrees?
360 degrees is a full circle, one full turn. 180 degrees is half a circle, or half a turn. Example: If you were walking down the sidewalk, and behind you your friend calls out "Hey!", you stop, and turn around 180 degrees to greet him.
