Question

Calcule a área de um quadrado cuja diagonal mede 12 cm

Answer 1

D = L$\sqrt{2}$

12= L $\sqrt{2}$

L = 12 / $\sqrt{2}$
L = 12$\sqrt{2}$ / 2
L = 6 $\sqrt{2}$

A = L.L
A = 6$\sqrt{2}$ . 6 $\sqrt{2}$
A = 72 cm²

Answer 2

D= L√2
12=L√2
L= 12/√2
L=12√2/2
L= 6√2cm
A= L.L
A= 6√2.6√2
A=36.√4
A=36.2
A=72cm^2