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OpenStudy (anonymous):
what is the sum of the external angles of a polygon?
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OpenStudy (anonymous):
If you walk around, it's a circle, so 360 degrees?
OpenStudy (anonymous):
Um... maybe it has to be convex....
OpenStudy (anonymous):
Yeah, otherwise you could theoretically just go on and on....
OpenStudy (anonymous):
lol - never thought of it that way! yes it has to be convex. the reason i asked this was that i was answering a question about interior angles of a polygon, and used the exterior angles to work it out. then someone wrote this was totally wrong - he was defining the external angles to mean the total reflex angles.
OpenStudy (anonymous):
he quoted (Zwillinger 1995, p. 270).
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OpenStudy (anonymous):
perhaps this is a' US thing'
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