Can anyone clarify which types of flaps Archers and 172s have

Help! - Adding flaps to Tutor single slot flaps McCormick notes that the optimal deflection angle is around 40 degrees for single slot flaps For other types the single slot diffuser The slot helps to prevent early separation, so the flap stays effective for larger deflection angles What that means in reality can be read

single slot gpu 2023 3) Slotted Flaps · They increase wing camber, like other flaps · When extended, they open a slot between the wing and the flap