In the wind triangle, the line from C to B represents what?

• A. Ground speed and true course
• B. Wind velocity
• C. True heading and TAS
• D. Magnetic variation

Answer: (C)

The line representing the aircraft’s motion through the air is the velocity of the airplane relative to the air. This is drawn along the direction the nose is pointed (the true heading) and its length corresponds to how fast the aircraft is moving through the air (true airspeed). In the wind triangle, wind is shown as a separate side, and the resulting ground track and ground speed come from combining the airspeed vector with the wind vector. Magnetic variation isn’t part of this triangle. So that line shows the airplane’s true heading and true airspeed.