Ta có: \(AB^2=HB\cdot HC\)
\(\Leftrightarrow HB\left(HB+16\right)=225\)
\(\Leftrightarrow HB^2+16HB-225=0\)
\(\Leftrightarrow HB=9\left(cm\right)\)
\(\Leftrightarrow AC=\sqrt{HC\cdot BC}=\sqrt{16\cdot25}=20\left(cm\right)\)
\(\Leftrightarrow AH=12\left(cm\right)\)