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Segment Triangulation: Proving an Ancestral Line


Have you heard the term “segment triangulation” associated with DNA and wondered what that meant? Perhaps you wondered if this could help you confirm an ancestor that you’ve researched? Which DNA testing and third party companies offer this tool? In this article, I’ll define the term and show how the process can help you in your genealogy journey of discovering your genetic family tree.

When autosomal DNA began being used by genealogists, segment triangulation was the gold standard and no testing company had a tool. It required asking DNA matches to upload their raw DNA to GEDMatch for comparison and using spreadsheets to track the segment data.