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B, Bayangan
T. Tiang = 3 cm
B. Tiang = 2 cm
B. Pohon = 10 cm
T. pohon / T.tiang = B. pohon / B.tiang
T. pohon / 3 = 10/ 2
T. pohon = 10 x 3 / 2
T. pohon = 30 / 2
Tinggi pohon = 15 cm