jawab ya makasih .........

a.)

[tex]x {}^{2} = 23 {}^{2} + 10 {}^{2} \\ x {}^{2} = 529 + 100 \\ x {}^{2} = 629 \\ x = \sqrt{629} \: \: cm[/tex]

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b.)

[tex]x {}^{2} = 15 {}^{2} + 12 {}^{2} \\ x {}^{2} = 225 + 144 \\ x {}^{2} = 369 \\ x = \sqrt{369} \\ x = 3 \sqrt{41} \: \: km[/tex]

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c.)

[tex]x {}^{2} = 7.6 {}^{2} - 6.8 {}^{2} \\ x {}^{2} = 57.76 - 46.24 \\ x {}^{2} = 11.52 \\ x = \sqrt{11.52} \\ x = \frac{12}{5} \sqrt{2} \: \: m[/tex]