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             2576     2007-12-21
 

1.

2.

3. 6 5


5

4. A B B

d d/2 =3 d/2

3d

3d/2=3 d/2

3 d/2=3 d/2

B

5. 45

45 45 90

6. 90

1/4

2 r/4+2r= r/2+2r= 1/2 +2 r

1/2 +2 r

7. 24

2

24 12=2

2 2=4

2 8+4 4=16+16=32

32

8. 40

40 40

3.14 40/2 2=3.14 400=1256

1256 40=50240

50240

9. 12.56 6

12.56 3.14 4

4 6 2 12

12 2 24

24

10. A B C D E F

(1) (2) (3)

2 3 A B C D F E 1 2 D A C E F B 1 3 C F

A E B D C F

11.

o

o A B C C D D

12. 1 2 3 4 5 6 3 7 K

K 3 K

K 7 3 4

K=4

13.

12 3 8

12 3 8 12 24 36

36

14.

15.

1

1


  • kitty     kitty 
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