Question Number 154434 by oustmuchiya@gmail.com last updated on 18/Sep/21
Answered by mr W last updated on 18/Sep/21
$$\frac{{BD}}{{AB}}=\frac{{AB}}{{BC}} \\ $$$$\Rightarrow{BD}=\frac{{AB}^{\mathrm{2}} }{{BC}}=\frac{\mathrm{8}^{\mathrm{2}} }{\mathrm{16}}=\mathrm{4} \\ $$