Write a Python program to input all sides of a triangle and check whether triangle is valid or not.

a = int(input('Please Enter the First Angle of a Triangle: '))
b = int(input('Please Enter the Second Angle of a Triangle: '))
c = int(input('Please Enter the Third Angle of a Triangle: '))
total = a + b + c
if total == 180:
    print("\nThis is a Valid Triangle")
else:
    print("\nThis is an Invalid Triangle")