Somebody pls help me.
The length of the path of point B is equal to 3 X arc AC.
Arc AC = {[2(2 / pi)] * pi} / 4 = 1 cm
The path of point B = 3 cm
Red ink shows the path of point B
I believe this is correct:
The path length traveled by B to B' = 8r = 8 ( 2/pi) = 16/pi cm
See the following illustration :
Thanks for helping! But the answer is a whole number.