I'm not sure what's wrong with this. can anyone say what.

```
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()
```