GEOMETRY IN ENEM'S EVIDENCE
ENEM. Reference Matrix. Geometry.
The National High School Exam − ENEM − is currently the main means of access to
Higher Education in the country. Therefore, students in the final years of high school, or
when completing it, who intend to enter Higher Education, need to dedicate themselves to
preparing for the ENEM tests, as they have levels of knowledge considered low, according
to data from the ENEM itself at each year and other assessments adopted by the Govern-
ment. Given this and thinking about contributing to the studies of those who aspire to
a place in Higher Education, this work presents some basic knowledge of Flat Geometry.
First, an analysis of the ENEM Reference Matrix and the tests carried out, from 2009
to 2019, was carried out, where we sought to outline the profile of Geometry questions.
This analysis is presented in chapter 2 and shows that of the mathematical questions that
correspond to a quarter of the tests, 32 % of them are charged with geometric knowledge,
and that the part of Geometry, charged in the tests, is very comprehensive. Thus, trying
to establish a didactic sequence, we present some basic notions of Geometry, fundamental
concepts of angles and a study of the triangle. With this, we hope to provide the reader
with material that contemplates geometric contents addressed in a considerable part of
the ENEM exam questions and that serves as a basis for the study of subsequent Ge-
ometry subjects, also collected in these exams. The theoretical part of the contents is
presented in chapter 3, with definitions and important results followed by some examples
and we end the chapter with a section of questions, collected from ENEM.