Question Number 91275 by I want to learn more last updated on 29/Apr/20
Commented by mr W last updated on 29/Apr/20
$$\left({A}\right) \\ $$
Commented by JDamian last updated on 29/Apr/20
$${what}\:{is}\:\boldsymbol{{a}}? \\ $$
Commented by mr W last updated on 29/Apr/20
$${b}−{a}\:{is}\:{given}.\:{so}\:{you}\:{can}\:{know}\:{what} \\ $$$${is}\:{a}. \\ $$
Commented by Tony Lin last updated on 29/Apr/20
$${a}^{\mathrm{2}} +{b}^{\mathrm{2}} ={c}^{\mathrm{2}} ={Area} \\ $$
Commented by mr W last updated on 29/Apr/20
$${c}^{\mathrm{2}} \:{is}\:{also}\:{correct}.\:{but}\:{it}\:{is}\:{requested} \\ $$$${in}\:{terms}\:{of}\:{a}\:{and}\:{b},\:{therefore}\:{only} \\ $$$$\left({A}\right)\:{is}\:{the}\:{right}\:{answer}. \\ $$
Commented by I want to learn more last updated on 29/Apr/20
$$\mathrm{Thanks}\:\mathrm{sir}. \\ $$