Question

Construct a square of diagonal $6$ cm long and calculate its area in sq. cm.

• A. $18$
• B. $36$
• C. $42$
• D. None of these

Answer 1

The correct option is A $18$

AC and BD are diagonals,
$AB=\frac{AC}{\sqrt{2}}=\frac{6}{\sqrt{2}}$
$area={\left(\frac{6}{\sqrt{2}}\right)}^2$
$=\frac{36}{2}$
$=18c{m}^2$