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153 - 9 = 144
akar 144 = 12
12 cm + 12 cm = 24 cm
dari Δ EBC
EB² = BC² - EC²
= (√153)² - 3²
= 153 - 9
= 144
EB = √144 = 12 cm
Panjag BD = 2xEB
= 2 x 12
= 24 cm