DB = 2 BC
AD = CD = BC + DB = 3 BC = 2
BC = 2/3
AB = AD + DB = 5 BC = 10/3 (cm)
已知線段AB,延長AB到C,使BC=二分之一DB,D為AC的中點(diǎn),CD=2cm,求AB
已知線段AB,延長AB到C,使BC=二分之一DB,D為AC的中點(diǎn),CD=2cm,求AB
數(shù)學(xué)人氣：538 ℃時(shí)間：2020-05-19 03:13:53
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