Given: AB = 13.3 cm, AC = 11.9 cm and EC = 5.1 cm.
Applying Thale’s Theorem,
Since we need to find DB first, we add 1 on both sides
⇒ DB = 5.7
AD is given by,
AD = AB – DB
⇒ AD = 13.3 – 5.7
⇒ AD = 7.6 cm
Hence, AD is 7.6
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