The length in feet of Brad's line of sight to the base of the flag pole as required in the task content is; 25 ft².
<h3>Pythagoras theorem</h3>
It follows from the task content that the length in feet of Brad's line of sight to the base of the flag pole is to be determined.
Given;
The flag pole in discuss is said to be 15 feet high.
Also, Brad is at the same height as the pole and is at a horizontal distance of 20 feet from the top of the pole.
Therefore, the line of sight alongside the two other dimensions above form a right triangle where, the hypothenuse is; the line of sight.
Therefore, since hyp² = opp² + adj²
hyp² = 15² + 20²
hyp² = 225 + 400
hyp² = 625
hyp = 25.
Therefore, the length of the line of sight is; 25 feet.
Read more on Pythagoras theorem;
brainly.com/question/654982
#SPJ1