摘要：Normal 0 21 false false false PT-BR X-NONE X-NONE DOI: http://dx.doi.org/10.14244/198271991260 This experience report presents some situations involving the work of prospective teachers of courses of exact sciences with the Geogebra software. The work was developed based on a university extension course. Its aim was to introduce students to a dynamic geometry environment, and explore its potential use in Elementary and High School math classes. This paper highlights some episodes that occurred during the course, evincing investigative activities in a computational environment that were explored by participants. In particular, it reports an episode which places prospective teachers in the so-called risk zone. Keywords : Mathematical education, Dynamic geometry, Geogebra, Risk zone. Normal 0 21 false false false PT-BR X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Normal 0 21 false false false PT-BR X-NONE X-NONE
