Question

Sona noticed that the paper windmill made by her grandmother looks the same even before it has completed one rotation. This is because of ______.

• A. mirror reflection
• B. translational symmetry
• C. rotational symmetry
• D. line of symmetry

Answer 1

The correct option is C rotational symmetry


Let A, B, C and D be the 4 leaves of the windmill.

When it rotates by 90 degrees, the leaves will be in the order D, A, B and C. But the windmill looks exactly the same as the original.

So, the windmill exhibits rotational symmetry.