Which flight path is at right angles to the landing runway off its upwind leg?

The flight path that is at right angles to the landing runway off its upwind leg is the crosswind leg. During the standard traffic pattern for landing, aircraft make a series of turns to position themselves for landing safely. As they fly the upwind leg—essentially flying straight out from the runway after takeoff—they will then turn onto the crosswind leg, which intersects the upwind leg at a right angle. This leg runs perpendicular to the runway, allowing aircraft to safely transition to the downwind leg before making a turn to approach the final landing path.

In the context of the other flight paths: the base leg is positioned at a right angle to the final approach, the final approach itself is the path taken when getting close to landing, and the downwind leg runs parallel to the runway but in the opposite direction of traffic. Each of these components plays a crucial role in the overall traffic pattern but does not fit the specific description of being at right angles to the landing runway off the upwind leg.