def is_triangleexists(a,b,c): 
    if(a != 0 and b != 0 and c != 0 and (a + b + c)== 180): 
        if((a + b)>= c or (b + c)>= a or (a + c)>= b): 
            return True 
        else:
            return False
    else:
        return False