tolong dijawab semua sama caranyatolong bangett

no 13
[tex] {x}^{2} = {10}^{2} - ( {10}^{2} - {4}^{2} ) \\ {x}^{2} = 100 - (100 - 16) \\ {x}^{2} = 100 - 84 \\ {x }^{2} = 16 cm[/tex]