In this work we study the geometry of conic sections and their geometric properties. We are particularly interested in the inscribed conics, i. e., the conics that are tangent to the sides of the polygon. We study their properties using results of Euclidean, such as isotomic and isogonal conjugation, and projective geometry, such as the polar correspondence. We deal with conics inscribed in a triangle, Steiner and Brocard ellipse, and a parabola inscribed in a triangle and a complete quadrilateral. To construct these conics with GeoGebra program, we need to find five points of the conic, since five points determine a conic, or some characteristic points, for example, foci.
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