tolong bamtu ya pake cara

KESEBANGUNAN

cari nilai EC
EC = akar (10^2 - 6^2)
= akar (100 - 36)
= akar 64
= 8 cm
cari BF
BC / AB = CE/ BF
10 / 9 = 8 / BF
10BF = 72
BF = 72/10
BF = 36 / 5
BF = 7 1/5 (A)


GOOD LUCK....