Respuesta :
C. Are simmetrical
Explanation
A. is false because only quadrilaterals have 4 sides
B. is false because polygons like equilateral triangle and regular pentagon have an odd number of sides
D. A polygon doesn't have an unique size. It changes every time, cause we can decide its size
Answer: The answer is C. are symmetrical.
Step-by-step explanation: There is a line of symmetry, which is a line where one half of the polygon is a mirror image of the other side. This means that even if a polygon has 5 sides, for example, then it would still be symmetrical.