초록(영문)
In geometry, it is said that transformations are referred to linear transformation like parallel translation. Inversion is not easy to apply
since its definition is limited to a circle. First of all, we observed, analyzed and proved some properties of inversion with GeoGebra
in this study. We induced some equation of figures when circles and straight lines are transformed under inversion by using linear
transformation. The formulas also applied to Arbelos and Apollonian gasket, and then we discovered the properties of them. After
transforming the circles on Arbelos and Apollonian gasket, we found and proved new properties of the two figures, and visualized them
with GeoGebra. Furthermore, we were able to coin ‘Ellipse Inversion,’ whose definition is expanded from inversion. We classified the
results from transforming a point, a straight line, a circle and an ellipse with an ellipse. As a further step, we showed the locus of figures
by using parametric equations. All study was based on ‘tool’ that we invented with GeoGebra. We also revealed some fundamental
properties preserved in a circle and an ellipse inversion. We expect that ‘Ellipse Inversion’, which is invented by us, will provide a basis
of research to expand the field of inversion.