The aims of the learning units are for the students to: draw and construct geometrical shapes using appropriate tools like compass, straightedge, protractor or dynamic geometry systems; deepen their understanding of the properties of parallel or perpendicular lines, perpendicular bisectors, angle bisectors, heights, median lines in triangles, the Thales theorem through constructing triangles; apply their knowledge of properties of parallel or perpendicular lines, perpendicular bisectors, angle bisectors, heights, median lines in triangles, the Thales theorem for solving geometrical and real... 
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