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https://math.stackexchange.com/posts/5133811/revisions Revisions to Determining a quadrilateral up to similarity with four angles - Mathematics Stack... four angles mathematics stack revisions determining quadrilateral https://math.stackexchange.com/posts/5133811/timeline Timeline for answer to Determining a quadrilateral up to similarity with four angles by Ethan... four angles timeline answer determining quadrilateral https://math.stackexchange.com/questions/5133803/determining-a-quadrilateral-up-to-similarity-with-four-angles geometry - Determining a quadrilateral up to similarity with four angles - Mathematics Stack... A triangle, up to similarity, is completely determined by two of its internal angles. A quadrilateral can be divided into two triangles, and those two... four angles mathematics stack geometry determining quadrilateral