Rt△CDB、Rt△CDA、Rt△ABC中,
△ABC∽△BCD∽△ACD
BD/CD=CD/DA
CD²=BD*DA=3/2* BD²
BD=CD*√(2/3)=2√6
AD=BD*(3/2)=3√6
CE=AB/2=(AD+DB)/2=5√6/2
Rt△CDB、Rt△CDA、Rt△ABC中,
△ABC∽△BCD∽△ACD
BD/CD=CD/DA
CD²=BD*DA=3/2* BD²
BD=CD*√(2/3)=2√6
AD=BD*(3/2)=3√6
CE=AB/2=(AD+DB)/2=5√6/2