Projective methods in the elementary geometry for example of the circle
This article continues the study of the author, which is concerned the subject «Projective methods in the elementary geometry». Article is dedicated to the examination of some properties of quadrangles, which relate to the projective geometry. These properties can be simply the proposals of projective geometry, either they can be connected or with the proof of any theorems of elementary geometry, or with conducting of constructions on the plane.