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 |