You swam the length of the pond shown below. How far did you swim? If necessary, round your answer to the nearest foot.

Answer:
The answer is 25 feet.
Step-by-step explanation:
You have to apply Pythagoras Theorem :
[tex] {c}^{2} = {15}^{2} + {20}^{2} [/tex]
[tex] {c}^{2} = 625[/tex]
[tex]c = \sqrt{625} [/tex]
[tex]c = 25 \: feet[/tex]