"Was the crucifixion on a cross, a stake or a tree"

Yahshua was crucified on a wooden stake made from a tree.
Acts 5:30 The God of our fathers raised up Yahshua, whereas you men killed him by having him hanged on a stake.

Yahshua carried the wooden cross beam
Luke 23:26 As the soldiers led Yahshua away, they grabbed a man named Simon, who was from the city of Cyrene. Simon was coming into Jerusalem. They laid the cross on him and made him carry it behind Yahshua.
The completed crucifixion on a wooden cross made from a tree.
It could not have been a “T” shape because they put the words, “This is Yahshua, the King of the Jews” over His head.
Matthew 27:37 They placed a written accusation above His head. It read, “This is Yahshua, the king of the Jews.”