Help what is it i cant do whatever peganroym therom thing is
Answer:
13.4
Step-by-step explanation:
use a^2+b^2=c^2
longest side=18 so c=18
other leg= 144
plug it in: 12^2+b^2=18^2
144+b^2=324
144+b^2=324-144
180 square root= 13.4