Bonsoir
AC² = 2.5 ² + 4.5 ² = 26.5
AC = √26.5 = 5.1 cm
DE² = 7 ² - 6 ² = 13
De = √13 = 3. 6
GH² = 8.4 ² - 5.3 ² = 42.47
GH = √ 42.47 = 6 .5
