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Sisi yang sebanding :
AB : BE, AC : DE, BC : BD

BC = √34² - 16²
= √1.156 - 256
= √900
= 30 cm

BE :
BC/BD = AB/BE
30/45 = 16/BE
30BE = 720
BE = 24 cm

EC = BC - BE
= 30 - 24
= 6 cm