# rotationalInertia

> The rotational inertia of the shape about the shape center.

## Definition

* **Type:** Property
* **Namespace:** [Unity.U2D.Physics](/engine/6000.7/script-reference/unity/u2d/physics.md)
* **Assembly:** UnityEngine.PhysicsCore2DModule

```csharp
public float rotationalInertia { readonly get; set; }
```