Objects of the types explained in Geometric Objects provide standard 1 predicates as attributes (for unary predicates) and methods (for binary predicates). Whether unary or binary, all return True or False.

几何对象提供标准谓词，包括一元谓词（属性）和二元谓词（方法）。无论是一元还是二元谓词都会返回True or False。