Tolong jawab pake cara yaa..makasih

CB = AD
CB = AD triple phytagoras 6 dan 10 = 8cm
perbandingan 9/6 = 3/2

3 / 2 = 8 / ( 8 – FD )

= 3 ( 8 – FA ) = 2 . 8
= 24 – 3 FA = 16
= – 3 FA = 16 – 24
= – 3 FA = – 8
FA = – 8 / – 3
FA = 2,6 cm
FD = AD – FA
FD = 8 – 2,6
FD = 5,4 cm