I'm in the same position as you, rickye.
I find the endgame unsatisfactory, not for the first time this year.
Are we really only supposed to show the relationship between the circle and a diameter? I know the 'correct letter' phrase points to this but it seems very trivial.
Why is 'area' chosen to be part of the circumference when 'nine' would have been more sensible? I too wondered about highlighting 'two' because 'area' is part of the shading.
I also looked for 2root(A*pi) = circumference because of area and pi taking up the circumference.
"radiusone" is a very loose way of saying r=1 if that is what is intended.
Not the normal Listener feeling when you *know* you have the correct answer and nothing else can be right.