9514 1404 393
Answer:
15 m
Step-by-step explanation:
The area of the square attached to the third side is the sum of the areas of the other squares:
81 m² +144 m² = 225 m²
The side length is the square root of this:
? m = √(225 m²) = 15 m
The length of the indicated side is 15 m.
