I do not understand why the below code isnt working? I suspect its because of "self.angle1=angle"

But i do not understand why i need "self.angle" instead of just angle?

I mean we define angle in the Equilateral triangle function

```
class Triangle(object):
number_of_sides=3;
def __init__(self,angle1,angle2,angle3):
self.angle1=angle1
self.angle2=angle2
self.angle3=angle3
def check_angles(self):
sum=self.angle1+self.angle2+self.angle3
if sum == 180:
return True;
else:
return False;
my_triangle=Triangle(90,30,60)
print my_triangle.number_of_sides;
print my_triangle.check_angles()
class Equilateral(Triangle):
angle=60;
def __init__(self):
self.angle1=angle;
self.angle2=angle;
self.angle3=angle;
```