A geometric modeling proposal

This proposal discusses some different possible approaches to a geometric modeling proposal can present as developments in a math class. Elementary concepts of similar triangles with the refinement of integration presents a construction developed with GeoGebra software, from which it allows also the operating parameter curves and strategies of the ellipse through the study of its elements basic and properties that characterize it. The main motivation for the work was given by the author's teacher curious to discover what the curve delimiting the region of the lateral surface of a cylinder when it is cut by a non-parallel to the baseline. In order to answer the research question and clarify the reading, are presented throughout the text, some images of the developed objects, which is believed to be able to be worked with the most different audiences.