Oops, try again. Failed to instantiate Equilateral, an error was thrown: 'Equilateral' object has no attribute 'angle1'

I am not sure what's wrong with my code, please help.

```
class Triangle(object):
def __init__(self,angle1,angle2,angle3):
self.angle1 = angle1
self.angle2 = angle2
self.angle3 = angle3
number_of_sides = 3
def check_angles(self):
if self.angle1 + self.angle2 + self.angle3 == 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 == self.angle
self.angle2 == self.angle
self.angle3 == self.angle
```