5. The Vecten points
The centers of the three squares ACaCbB, BAbAcC and CBcBaA form a triangle perspective with ABC. The perspector is called the Vecten point of the triangle. 3 By the same token the centers of three squares constructed inwardly on the three sides also form a triangle perspective with ABC. The perspector is called the second Vecten point. 4 We show that each of the Vecten points befriends itself.
2For QA, this is the same line when