Respuesta :
3 colors are the maximum that can be used.
What is square?
Having four equal sides, a square is a quadrilateral. There are numerous square-shaped objects in our immediate environment. Each square form may be recognized by its equal sides and 90° inner angles. A square is a closed form with four equal sides and interior angles that are both 90 degrees. Numerous different qualities can be found in a square.
each square of the three-by-three grid is painted so that the whole picture has at least the two lines of symmetry indicated.
each grid square is painted one solid color
Based on the symmetry lines the groups that must be the same color are
{1,3,7,9}
{2,4,6,8}
and {5}
Hence, 3 colors are the maximum that can be used.
Learn more about the square, by the following link.
brainly.com/question/25092270
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