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2019 IGO Intermediate P2

Source: 6th Iranian Geometry Olympiad (Intermediate) P2

September 20, 2019
IGOIrangeometry

Problem Statement

Find all quadrilaterals ABCDABCD such that all four triangles DABDAB, CDACDA, BCDBCD and ABCABC are similar to one-another.
Proposed by Morteza Saghafian
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