(1)△ABD的周长-△ACD的周长=AB+BD+AD-(AC+CD+AD)=AB-AC=2(cm)
(2)作CE⊥AB与E,作BF⊥CA于F
则∠CAE=180°=∠CAB=∠BAF
∴△CAE~△BAF
∴CE:BF=AC:AB=3:5
故AC边长的高BF =2·5/3=10/3
(1)△ABD的周长-△ACD的周长=AB+BD+AD-(AC+CD+AD)=AB-AC=2(cm)
(2)作CE⊥AB与E,作BF⊥CA于F
则∠CAE=180°=∠CAB=∠BAF
∴△CAE~△BAF
∴CE:BF=AC:AB=3:5
故AC边长的高BF =2·5/3=10/3