No. 9. Please...
sama cara.nya
cpet
sama cara.nya
cpet
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tarik garis dari x ke ttk P (tengah2 HG)
tarik garis dari x ke T
XT tegak lurus dgn PT
ST sejajar dgn FG = 8 cm
ST tegak lurus HS
XT = 9
sdt XHG dgn bidang ABFE adalah PXT
tg PXT = PT / XT
cari PT dulu
segitiga PST siku2 di S
PS^2 + ST^2 = PT^2
PG = 15/2 = 7,5
krn SG = 3 maka PS = 4,5
4,5^2+ 8^2 = PT^2
PT = 9,17
tg PXT = 9,17 / 9 = 1,01 (pakai kalkulator)
sdt PXT = 45,53 derajat