what is the length of the missing leg?

Answer:
6 meters
Step-by-step explanation:
because 15-9=6 meters
Answer:
12
Step-by-step explanation:
Using the Pythagorean theorem:
[tex]9^2+a^2=15^2[/tex] ->
[tex]81+a^2=225 \implies[/tex]
[tex]a^2=144\implies[/tex]
[tex]a=12[/tex]