∵△BCD中,BE:EC=2:1,∴EF=
| 1 |
| 3 |

又∵AD:DB=2:1,得BD=
| 1 |
| 2 |
∴EF=
| 1 |
| 6 |
∵△APD∽△EPF,得
| AP |
| PE |
| AD |
| EF |
∴AP=6PE,得AP=
| 6 |
| 7 |
∵△APC与△ACE有相同的高,其面积比等于底边的比
∴
| S△APC |
| S△ACE |
| AP |
| AE |
| 6 |
| 7 |
| 6 |
| 7 |
又∵CE=
| 1 |
| 3 |
| 1 |
| 3 |
| 14 |
| 3 |
∴S△APC=
| 6 |
| 7 |
| 6 |
| 7 |
| 14 |
| 3 |
即△APC的面积等于4.
| 1 |
| 3 |

| 1 |
| 2 |
| 1 |
| 6 |
| AP |
| PE |
| AD |
| EF |
| 6 |
| 7 |
| S△APC |
| S△ACE |
| AP |
| AE |
| 6 |
| 7 |
| 6 |
| 7 |
| 1 |
| 3 |
| 1 |
| 3 |
| 14 |
| 3 |
| 6 |
| 7 |
| 6 |
| 7 |
| 14 |
| 3 |