/// <summary>
/// constructor
/// </summary>
/// <param name="successor"></param>
public RightTriangleBuilder(TriangleBuilder successor) : base(successor)
{
}
/// <summary>
/// constructor
/// </summary>
/// <param name="successor"></param>
public EquilateralTriangleBuilder(TriangleBuilder successor) : base(successor)
{
}
/// <summary>
/// constructor
/// </summary>
/// <param name="successor"></param>
public SimpleTriangleBilder(TriangleBuilder successor) : base(successor)
{
}