Circle properties (and methods?)

I have been doing a lot of object-oriented programming lately, so my question is a little related to it.

I was teaching mathematics (geometry) to my friend and I came up with a question:

In Scala we would have circle probably defined as this:

...

}

So Circle class has a property name "radius" and methods (area, diameter, etc.) which use "radius" in calculations.

Are these all "properties" of a circle in mathematics, or are there different terms for radius (since everything is defined by radius) and methods such as an area?

• A circle is defined fully its radius... if you fix a coordinate system you need a centre and a radius. – JP McCarthy Nov 23 '15 at 11:18

Like print MyCircle.Area, rather than MyCircle.Area(), which would be a method.
If the properties are wrapped, one could also consider that GetArea() is a property, in the same sense as GetRadius().
In your description, Area seems to be a read-only property (hence no setter). But it could be otherwise, by defining
def SetArea(val Area: Double) radius= sqrt(Area / π)