| 3 |
| 10 |
| 2 |
| 5 |
| 1 |
| 5 |
| 1 |
| 10 |
(FG×AF):(FG×FD)=
| 3 |
| 10 |
| 2 |
| 5 |
AF:FD=3:4;
AF就是大正方形边长的
| 3 |
| 7 |
1×
| 3 |
| 7 |
| 3 |
| 7 |
(BE×EF):(EH×EC)=
| 1 |
| 5 |
| 1 |
| 10 |
BE:EC=2:1;
BE是大正方形边长的
| 2 |
| 3 |
1×
| 2 |
| 3 |
| 2 |
| 3 |
GH=
| 2 |
| 3 |
| 3 |
| 7 |
| 5 |
| 21 |
| 5 |
| 21 |
| 5 |
| 21 |
| 25 |
| 441 |
答:阴影部分的面积是
| 25 |
| 441 |
| 1 |
| 10 |
| 1 |
| 5 |
| 3 |
| 10 |
| 2 |
| 5 |

| 3 |
| 10 |
| 2 |
| 5 |
| 1 |
| 5 |
| 1 |
| 10 |
| 3 |
| 10 |
| 2 |
| 5 |
| 3 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
| 1 |
| 5 |
| 1 |
| 10 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 2 |
| 3 |
| 3 |
| 7 |
| 5 |
| 21 |
| 5 |
| 21 |
| 5 |
| 21 |
| 25 |
| 441 |
| 25 |
| 441 |