Question Number 55138 by Learner last updated on 18/Feb/19
Commented by math1967 last updated on 18/Feb/19
$${PT}^{\mathrm{2}} ={PA}×{PB} \\ $$$$\therefore{PA}=\frac{\mathrm{6}×\mathrm{6}}{\mathrm{3}}=\mathrm{12}{cm} \\ $$$$\therefore{AB}=\mathrm{12}−\mathrm{3}=\mathrm{9}{cm} \\ $$