<!--
{
  "availability" : [
    "iOS: 11.0.0 -",
    "iPadOS: 11.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "ARKit",
  "identifier" : "/documentation/ARKit/ARFaceGeometry/triangleCount",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "ARKit"
    ],
    "preciseIdentifier" : "c:objc(cs)ARFaceGeometry(py)triangleCount"
  },
  "title" : "triangleCount"
}
-->

# triangleCount

The number of triangles described by the [`triangleIndices`](/documentation/ARKit/ARFaceGeometry/triangleIndices-3tb1o) buffer.

```
var triangleCount: Int { get }
```

## Discussion

Each set of three indices forms a triangle, so the number of indices in the [`triangleIndices`](/documentation/ARKit/ARFaceGeometry/triangleIndices-3tb1o) buffer is three times the [`triangleCount`](/documentation/ARKit/ARFaceGeometry/triangleCount) value.

Face mesh topology is constant across [`ARFaceGeometry`](/documentation/ARKit/ARFaceGeometry) instances, so the value of this property is the same for all instances.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)