GeoAR [16]: designed for teaching and learning of
geometric shapes, as recommended in elementary
school mathematics contents. To use the GeoAR book,
you must have a webcam connected to your computer
and a video monitor. The content covered in the
GeoAR book comprises the following topics related to
geometry: rectangle, square, triangle, classification of
the triangles according to their sides, classification of
the triangles by their angles, trapezoids, pentagons and
circles.