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Keywords: Dragon's Eye symbol Koch.svg The claimed Dragon's Eye symbol based on the depiction in Rudolf Koch's Book of Signs An isosceles triangle which is approximately intermediate between a right isosceles triangle i e half-square and an equilateral triangle and which is divided by internal lines into three approximately equal areas Own work based on copyright-ineligible geometric design in book by Rudolf Koch died more than 70 years ago 2012 AnonMoos v g fl Triangular symbols Rudolf Koch |