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Apr 13, 2017 at 12:50 history edited CommunityBot
replaced http://matheducators.stackexchange.com/ with https://matheducators.stackexchange.com/
Dec 18, 2016 at 15:07 comment added Amy B Although my students up to 6th grade don't work with angles greater than 180 degrees, they are introduced to the 360 degree angle of a circle as young as 4th grade.
Dec 16, 2016 at 1:54 answer added James S. Cook timeline score: 2
Dec 15, 2016 at 23:25 answer added MathGuy timeline score: 5
Dec 15, 2016 at 0:35 comment added DavidButlerUofA A beginning answer: reflex angles were in our Year 8 (13-year-olds) curriculum here in South Australia.
Dec 14, 2016 at 23:59 history asked Joseph O'Rourke CC BY-SA 3.0