------
## 最终结论
```python
def check_Triangle(x1, y1, x2, y2, x3, y3):
    # Calculate the area of the triangle formed by the three points
    area = 0.5 * abs(x1*(y2-y3) + x2*(y3-y1) + x3*(y1-y2))
    
    # If the area is zero, the points are collinear and do not form a triangle
    if area == 0:
        return 'No'
    else:
        return 'Yes'

# Test cases
assert check_Triangle(1,5,2,5,4,6) == 'Yes'
assert check_Triangle(1,1,1,4,1,5) == 'No'
assert check_Triangle(1,1,1,1,1,1) == 'No'
```