enter the three angles a1, a2, and a3, and then program will check that its valid triangle or not. If it’s valid triangle, then find the factorial of a1 with while loop, and find that a2 is a...

enter the three angles a1, a2, and a3, and then program will check that its valid triangle or not. If it’s valid triangle, then find the factorial of a1 with while loop, and find that a2 is a palindrome number or not.  If a2 is palindrome, then find the factorial of a2.