# IsCircle

Verifies an object is a circle curve object or is a NURBS curve object
that looks like a circle.

### Syntax

Rhino.IsCircle (strObject [, dblTolerance]))

### Parameters

strObject |
Required. String. The object's
identifier. |

dblTolerance |
Optional. Number. If the curve
is not a circle curve object, then the tolerance used to determine
whether or not the NURBS form of the curve has the properties
of a circle. If omitted, Rhino's internal zero tolerance is used. |

### Returns

Boolean |
True if successful, otherwise False. |

Null |
On error. |

### Example

Dim strObject

strObject = Rhino.GetObject("Select
a circle")

If Rhino.IsCircle(strObject)
Then

Rhino.Print "The object
is a circle."

Else

Rhino.Print "The object
is not a circle."

End If

### Also See

AddCircle

AddCircle3Pt

CircleCenterPoint

CircleCircumference

CircleRadius