Verified answer

Bonjour,

Pythagore

diagonale ²  = 8,9² + 5²

79,21+ 25 =104,21

diagonale = √104,21

≈ 10,21 cm

bonjour

d² = 8.9² + 5 ²

d² =  104.21

d = √104.21 = ≅ 10.21 cm