How to prove this general result on tucker circle?
Solution 1:
$X_1, X_2, X_3, X_4$ are definitely cyclic.
Next, show that $X_1, X_4, X_2, X_6$ are cyclic.
Do the same thing to $X_1, X_4, X_5, X_3$.
$X_1, X_2, X_3, X_4$ are definitely cyclic.
Next, show that $X_1, X_4, X_2, X_6$ are cyclic.
Do the same thing to $X_1, X_4, X_5, X_3$.