class Triangle:

    base=0

    height=0

    def set_length(a,b,self):

        self.base=a

        self.hight=b

    def print_area(self):

        return (a*b)/2

class RATriangle(Triangle):

    def print_hypotenuse(a,b):

        c=(a**2+b**2)**(1/2)

        return c

이렇게 입력했는데 

Internal Error: 'int' object has no attribute 'base'

이렇게 오류떠 ㅠㅠㅠ 어떻게 해야하는거야?