Why Are There 360 Degrees In A Circle
Olivia Luz
This probably happened about 2400 bc.
Is it just a convention like kg or metre or there is some reason for choosing 360. A quarter circle can have 250 degrees. Why a circle has only 360 degrees. The other day i was helping my 12 year old cousin with his math homework.
So although angles come from the greeks. Consequently they divided the circular path into 360 degrees to track each day s passage of the sun s whole journey. His homework had questions related to the area of a circle with a certain radius and circumference. The larger angle at the intersection of a vertical and a horizontal line creates a 270 degree angle.
In radians pi means half circle as 2 pi r represents the circumference of whole circle. The length of the year even if you have absolutely no idea right at this instant why there are 360 degrees in a circle i bet that if you stop and think for a few minutes you can figure out one possibility. The babylonians devised a counting system based not on units of 10 but on units of 60 which can be counted to on the 12 knuckles of one hand and the five fingers of the other. As to the question of why 360 degrees was chosen here s what we think happened reason 1.
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Why not 1000 degrees. He needed a method of measuring angles and naturally followed the babylonian division of the ecliptic into 360 degrees dividing the circle the same way. It was the babylonians who first divided the circle into 360 degrees in order to integrate the geometry they developed with the 360 day calendar then in use. Why are there 360 degrees in a circle.
So although angles come from the greeks. A full circle is 360 degrees because of the babylonian s usage of the sexagesimal system number of days in a year and also because 360 is highly composite. Around 1500 bc egyptians divided the day into 24 hours though the hours varied with the seasons originally. That s how we got a 360 degree circle.
He needed a method of measuring angles and naturally followed the babylonian division of the ecliptic into 360 degrees dividing the circle the same way. It is equal to one half a rotation around a circle.
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