Calculate the moment of inertia of a ring about a tangent to the circle of the ring normal to its plane.

Explanation

To calculate the moment of inertia of a ring about a tangent to the circle of the ring that is normal to its plane, we can follow these steps:

### Step 1: Understand the Problem
We have a ring of mass \( m \) and radius \( R \). We need to find the moment of inertia of this ring about a tangent line that is perpendicular to the plane of the ring.

### Step 2: Moment of Inertia about the Center of Mass
The moment of inertia \( I_{CM} \) of a ring about an axis through its center and perpendicular to its plane is given by the formula:
\[
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