.______.___._. 图5
A D B C
AC=2CD=4
AB=3/4AC=3
如图5所示,延长线段AB到C,使BC=1/3AB，D为AC的中点，CD=2，求AB的长
.______.___._. 图5
A D B C
AC=2CD=4
AB=3/4AC=3
.______.___._. 图5
A D B C
AC=2CD=4
AB=3/4AC=3
.______.___._. 图5
A D B C
AC=2CD=4
AB=3/4AC=3
.______.___._. 图5
A D B C
AC=2CD=4
AB=3/4AC=3