Tolong dong kak?.............

1. QS^2 = SR × PS
= 6 × (30-6)
= 6 × 24
= 144
QS = √144 = 12
jadi panjang QS = 12 cm
keterangan : ^2 = kuadrat

2. Panjang foto = 60-5-x = 55-x
Lebar foto = 40-5-5 = 30
55-x/60 = 30/40
55-x = 30/40 × 60
55-x = 45
55-45 = x
x = 10
jadi sisa karton bagian bawah = 10cm

3. diketahui :
tinggi anton = 150 cm = 1,5 m
bayangan anton = 3 m
bayangan pohon = 6 m
ditanya : tinggi pohon ?
jawab :
t pohon/t anton = bay pohon/bay anton
= t pohon/1,5 = 6/3
= t pohon = 6/3 × 1,5
= 3
jadi tinggi pohon adalah 3 m