Question

A diagonal de um quadrado de lado 3 cm é
(A) 3 cm.
(B) 73 cm.
(C) 3/2 cm
(D) 6 cm​

Answer 1

$A^2 = B^2 + C^2\\A^2 = 3^2 + 3^2\\A^2 = 9 + 9\\A^2 = 19\\A = \sqrt{19}\\A = 3\sqrt{2}\\C)$

Answer 2

d = L.√2 = 3√2 cm

=> parece: (C) 3/2 cm