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AC^2 = AB^2 + BC^2
AC^2= 8^2 + 6^2
AC^2 = 64 + 36
AC^2 = 100
AC = V100 = 10
AD^2 = CD^2 - AC^2
AD^2 = 26^2 - 10^2
AD^2 = 676 - 100
AD^2 = 576
AD = V576 = 24
AD + AC = 24 + 10 = 34