Volume no :42, Issue no: 1, November (2016)

THE THEORY OF AN INSCRIBABLE QUADRILATERAL AND A CIRCLE THAT FORMS PASCAL POINTS

Author's: David Fraivert
Pages: [81] - [107]
Received Date: November 27, 2016
Submitted by:
DOI: http://dx.doi.org/10.18642/jmsaa_7100121742

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 expand it to the case where the quadrilateral is inscribable. We prove five new theorems that describe properties in the following subjects:

● Necessary and sufficient conditions for a quadrilateral to be inscribable, which are determined by a circle coordinated with the Pascal points formed by it.

● Properties of the perimeters and areas of quadrilaterals inscribed in an inscribable quadrilateral, and that are associated to circles “that form Pascal points on the sides of the quadrilateral”.

Keywords

inscribable quadrilateral, tests for the inscribability of a quadrilateral, the method of complex numbers in plane geometry, Pascal points on the sides of a quadrilateral, a circle that forms Pascal points, a circle coordinated with the Pascal points formed by it, Thales’ tehorem.