David Fraivert, Properties of the tangents to a circle that forms Pascal points on the sides of a convex quadrilateral,
Forum Geometricorum, 17 (2017) 223--243.
Abstract. The theory of a convex quadrilateral and a circle that forms Pascal points is a new topic in Euclidean geometry. The theory deals with the properties of the Pascal points on the sides of a convex quadrilateral, the properties of ``circles that form Pascal points'', and the special properties of ``the circle coordinated with the Pascal points formed by it''. In the present paper we shall continue developing the theory and prove six new theorems that describe the properties of the tangents to the circle that forms Pascal points.
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