Question

1. which shapes have infinite rotational symmetry?

a. pentagon
b. square
c. circle
d. triangle

Explanation:

• A pentagon has rotational symmetry of order 5.
• A square has rotational symmetry of order 4.
• A circle can be rotated by any angle around its center and still look the same, so it has infinite rotational symmetry.
• A triangle (equilateral has order 3, isosceles and scalene have less).

Answer:

C. Circle