Question

Find AD using similarity ​

Answer 1

Step-by-step explanation:

∆ ADB is similar to ∆ACD

......(they lie in same right triangle)

side DB = side DC

side DC = 9 cm

by Pythagoras theorem,

AC^2 = AD^2+CD^2

AD^2 = (13+9) (13-9)

AD^2 = 22 × 4

AD = √88