Which of the following is not a regular polygon?
A. Square
B. Equilateral triangle
C. Rectangle
D. Regular hexagon
Answer:C
Which of the following is not a regular polygon?
A. Square B. Equilateral triangle C. Rectangle D. Regular hexagon
Explanation: A regular polygon is both equiangular and equilateral. But all four sides of a rectangle are not equal, thus it is not a regular polygon.