Answer:
16 feet
Step-by-step explanation:
The geometry of the problem can be modeled by a right triangle. The Pythagorean theorem tells us the relationship between the various distances.
EH² +HF² = EF²
EH² + 12² = 20²
EH² = 400 -144
EH = √256 = 16
The hook is 16 feet below Edna.
