In this section of the artwork [i]Concreção 9324[/i], we highlight a line containing the sides of parallelograms and right isosceles triangles. What does this line represent in this section?
This line represents an axis of symmetry, as the parallelograms and isosceles triangles in the upper part (for example) are the reflection, with respect to this line, of the parallelograms and isosceles triangles in the lower part of the image.