Question

find the area of square whose diagonal is 17cm

Answer 1

area of square=
$\frac{1}{2} \times ( {diagonal)}^{2} \\ \\ \frac{1}{2} \times 17 \times 17 \\ \\ \frac{289}{2} \\ \\ 144.5 \: \: {cm}^{2}$
hope it helps you

Answer 2

diagonal =s√2
17=s√2
17/√2=s
area of sq.=(17/√2)²
=144.5cm²