Jawapan

2016-08-10T16:45:40+08:00
Sin x= tentang/hipotenus
3/5= EF/20
60=5EF
60/5=EF
12=EF
FGH= √(20²-12²)
        = 16 cm
i) GH= 16÷2
      = 8 cm

maaf, ii) yg tu sye x tahu nk buat
x pa, tq
wc