Question Number 189665 by Rupesh123 last updated on 20/Mar/23
Answered by HeferH last updated on 20/Mar/23
$$\mathrm{AB}^{\mathrm{2}} \:=\:\mathrm{16}\centerdot\mathrm{9} \\ $$$$\mathrm{AB}\:=\:\mathrm{12} \\ $$
Commented by cortano12 last updated on 20/Mar/23
$$\mathrm{what}\:\mathrm{the}\:\mathrm{formula}? \\ $$
Commented by som(math1967) last updated on 20/Mar/23
$$\bigtriangleup{ABP}\sim\bigtriangleup{CBA} \\ $$$$\therefore\frac{{AB}}{{BP}}=\frac{{BC}}{{AB}} \\ $$$$\Rightarrow{AB}^{\mathrm{2}} =\left(\mathrm{7}+\mathrm{9}\right).\mathrm{9} \\ $$$${AB}=\mathrm{12}{cm} \\ $$