Question

2. Each diagonal of a square is 12 cm long Its area is
(a) 144 cm2
(b)72 cm2
​

Answer 1

Answer:

1/2×(12)square

=1/2×144

=72cm2

Step-by-step explanation:

I hope this answer may help you

Answer 2

Answer:

$72cm {}^{2} \: is \: your \: answer .$

Step-by-step explanation:

$we \: know \: that \: a \: square \: is \: also \: a \: rhombus \: \\ therefore \\ area \: of \: square = \frac{1}{2} \times d_{1} \times d _{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{1}{2} \times {(12cm)}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{1}{2} \times 144cm {}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 72cm {}^{2}$