Question Number 118251 by oustmuchiya@gmail.com last updated on 16/Oct/20
Answered by bobhans last updated on 16/Oct/20
$$\left({a}\right){perimeter}\:=\:\mathrm{24}\:{cm} \\ $$$$\left({b}\right)\:{area}\:=\:\frac{\mathrm{1}}{\mathrm{2}}×\mathrm{4}×{h}\:=\:\mathrm{8}\sqrt{\mathrm{6}}\:{cm}^{\mathrm{2}} \\ $$$$\:{where}\:{h}\:=\:\sqrt{\mathrm{100}−\mathrm{4}}\:=\:\sqrt{\mathrm{96}}\:=\:\mathrm{4}\sqrt{\mathrm{6}}\: \\ $$