You are stationed at a radar base in Warner Robins, GA and you observe an unidentified flying object at an altitude of 2000 m flying towards your radar base at an angle of 20 degrees. How far away from the radar base is that plane (hypotenuse)?

Answer 1

Once you made your diagram, and let the hypotenuse equal to h, this becomes a basic case of solving

sin 20º = 2000/h for h