Respuesta :
Answer:
12
It is a common Right triangle side - 9-12-15. its the same as a 3-4-5 triangle
Answer: 12
Step-by-step explanation:
15 is the hypotenuse (c), and 9 is one side (a)
a^2+b^2=c^2
1. Find Values of Squared Numbers: 81+b^2=225
2. Subtract 81 from 225: b^2=144
3. Find the square root of each side: b=12