The medial triangle joins the three midpoints of a triangle's sides. Each side is parallel to the corresponding original side and has half its length: . Each altitude of a triangle in the medial triangle is a perpendicular bisector of an original side, so its orthocenter is the original triangle's circumcenter.
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In geometry, a medial triangle is a triangle formed by connecting the midpoints of the sides of another triangle. If you have a triangle \( ABC \), the midpoints of sides \( AB \), \( BC \), and \( CA \) are labeled as \( D \), \( E \), and \( F \) respectively. The triangle formed by these midpoints \( DEF \) is called the medial triangle.