public Ring(Round round, float radius2) : this(round.Radius, radius2)
{
}
public Ring(Round round1, Round round2) : this(round1.Radius, round2.Radius, round1.Centre)
{
}
public Ring(Round round, float radius2) : this(round.Radius, radius2)
{
}
public Ring(Round round1, Round round2) : this(round1.Radius, round2.Radius, round1.Centre)
{
}