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### Converted by pdf suite

1. 1. FF 3 .3
2. 2. = 1 × 2 × 3 _ × ( F )2 F F = 4 = s(s − a )(s − b )(s − c )a s= a+b+c b 2 c
3. 3. = F × F F = กF × = 1× ก F F × 2 F = ×=1 × 2 F × ก F ก
4. 4. F = กF x = F x F = 1 ×( 2 ก F F )×F = x = + F
5. 5. = x F = (ก F x )x = ( F x F )x 3 F F = x( F )2 x 4ก กF F
6. 6. = ( 1× 2 ก F F × )x
7. 7. F F Fก ก = 2 F ก = 2πr ก = πr2F π 1. F F F 22 7 2. F 3.14
8. 8. F ก ก = 2πrh ก ก( F ) = πr2 ก ก = 2πrh + 2(πr2) ก ก = πr2h h r rh ก ก
9. 9. r h Rก กก = πR2h - πr2h ก กก = πh (R2 - r2)
10. 10. = F x F F =กF x= 1 × 2 ×
11. 11. F = F x (½x F x ) F =½x x F = × 2
12. 12. = + F= +( × ) 2
13. 13. = 1 × 3 ×
14. 14. l h r 2 l = h2 + r2 F ก = πr l ก = πr2 ก = πr l + πr2
15. 15. ก = 1 πr2h 3r h
16. 16. ก = 4πr2
17. 17. ก = 4 πr3 3