Among the four letters H, N, S and Z, each looks the same after a half-turn.
How many of these four letters have rotational symmetry of order exactly 2?

Question

Among the four letters H, N, S and Z, each looks the same after a half-turn. How many of these four letters have rotational symmetry of order exactly 2?

Accepted Answer

4. H, N, S and Z all look the same after a 180° turn but not after a 90° turn, so all 4 have order exactly 2.

Among the four letters H, N, S and Z, each looks the same after a half-turn.
How many of these four letters have rotational symmetry of order exactly 2?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 7 Rotational Symmetry practice

Among the four letters H, N, S and Z, each looks the same after a half-turn.How many of these four letters have rotational symmetry of order exactly 2?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 7 Rotational Symmetry practice

Among the four letters H, N, S and Z, each looks the same after a half-turn.
How many of these four letters have rotational symmetry of order exactly 2?