(I need someone to answer fast please and a clear answer too so ill mark them as brainlyest) :)

Answer: 12.6 m
Step-by-step explanation:
Use the pythagorean theorem, we get that the height, or x, is
sqrt(22x22-18x18) = sqrt(484-324) = sqrt(160) = 4sqrt(10) = 12.6 m
Answer:
base=18m
hypotenuse=22 m
perpendicular=?
we know,
h^2=p^2+b^2
22^2=p^2+18^2
484-324=p^2
160=p^2
√160=p
p=12.64 m