from django.db import modelsimport math, json, osfrom django.conf import settings# 기본 도형 클래스class Shape(models.Model): name = models.CharField(max_length=100) perimeter = models.FloatField() surface_area = models.FloatField() def __str__(self): return f"{self.name}: Perimeter={self.perimeter}, Area={self.surface_area}"# 원 클래스class Circle(Shape): radius = models.FloatField()..