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Langkah #1. Mencari panjang AB
AB² = AC² - BC²

[tex]AB= \sqrt{AC^2-BC^2} \\ AB= \sqrt{40^2-24^2} \\ AB= \sqrt{1600-576} \\ AB= \sqrt{1024} \\ AB=32\ cm [/tex]

Langkah #2. Mencari panjang BD
BD² = CD² - BC²

[tex]BD= \sqrt{CD^2-BC^2} \\ BD= \sqrt{25^2-24^2} \\ BD= \sqrt{625-576} \\ BD= \sqrt{49} \\ BD=7\ cm[/tex]

AB = AD + BD
AD = AB - BD
AD = 32 - 7
AD = 25 cm

***Semoga Terbantu***

jawabannya B
[tex]ab = \sqrt{ {40}^{2} - {24}^{2} } \\ = \sqrt{1600 - 576} \\ = \sqrt{1024} \\ = 32[/tex]
[tex]bd = \sqrt{ {25}^{2} - {24}^{2} } \\ = \sqrt{625 - 576} \\ = \sqrt{49} \\ = 7[/tex]
[tex]ad = ab - bd \\ = 32 - 7 \\ = 25[/tex]