Question Number 51837 by Tawa1 last updated on 31/Dec/18
Commented by afachri last updated on 31/Dec/18
$$\frac{{AB}}{{AD}}\:\:=\:\:\frac{{AD}}{{AE}} \\ $$
Answered by afachri last updated on 31/Dec/18
$$\frac{\mathrm{10}}{\mathrm{4}}\:\:=\:\:\frac{\mathrm{4}}{{x}}\:\:\:\Rightarrow\:\:\:\:{x}\:\:=\:\:\mathrm{1}.\mathrm{6}\:\mathrm{cm} \\ $$$$\mathrm{Area}\:\mathrm{of}\:\mathrm{DAEF}\:\::\:\:\mathrm{4}\:×\:\mathrm{1}.\mathrm{6}\:\:=\:\:\mathrm{6}.\mathrm{4}\:\:\mathrm{cm}^{\mathrm{2}} \\ $$