9. In the given figure, find the length AC.
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AC = AD + DC
AD = √10^2 - 8^2 cm
AD = √100 - 64 cm
AD = √36 cm
AD = 6 cm
DC = √17^2 - 8^2 cm
DC = √289 - 64 cm
DC = √225 cm
DC = 15 cm
AC = 6 cm + 15 cm = 21 cm
The length of AC is 21 cm.
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