# isValid

> Whether the geometry describes a circle that can be used.

## Definition

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

```csharp
public readonly bool isValid { get; }
```

### Remarks

The center must be finite, and the radius must be finite and zero or greater.