72 + + 60 2 4. 72 72 2 + 20 2 + 2.4 20 60 60 8 =.4 22 72 2 + 002 + 0.4 20 60 90 =.4 22 2 + 600 0.44 72 + + 60 72.422 + 2.4 20 + 20 2 60 72 =.4 22 2 + 0 20 + 40 60 72 =.4 40 + 600 + 600 60 72 =.400 + 600 60 72.42 20 60 =.422 20

0 0 0 0 0 0 + = 0 0 - = 49. 0 0 + - 0 0 = - 0 2 * 8 2 40 7 2 2 7 2 40 7 40-2 = 60 7

2 60 + 2 = 46 40-2 2 7 = 60

* 200 9 200 - = 600 9 200 - - 200-9

2

2 8.8 2 =.2 [.6 +.6-2.8 +.6-2.8 2 ] 8 + 6 + 0 = [.6 + 8.8 + 8.8 2 ] 24 = [.6 + 8.8 +.2] 24

40 + 402 = 90 4 40 + 40 2 [ 20-40- 40 2 2] 4 4 = 9060 =.

4 8 7 4 8 7 7 240 6 240 6 4 4 = 2 20 4 = 20 2 20 20 20

60 0 60 4 0

200 4 200

2 20 + 2 7 = 20 = 294 20 7 [20 + 2 ] = 470 [20 7 ]

7 + = 00 20-2 - 7 20-7 2 [7 + ]

* 200 9 8 200 8 200 = 40 8

200-0 -200 9 8 8 24 = 2.4 0 20 = 2 0

20 - v = 0.4 v = 20-0.4 = 20-6 = 4 24-4 = 0 v -4 = v -4 = v = +4

2 = 2 2 = 2 6 = 6 2 + 2 + 6 = 9 + 4 + 6 =

0 = 4 2 2 0 = 20 0 = 2 6

86 = + = 2 2

9 + = 2 2 = 08

6 + 4 = 9 0 9 40 = 6 0 6 40 = 6 6+ 4 24 4 4-4 = 4 24 = 2 4 - = 2

4 2 2 9 4 2 9-4 9-2 = 7 4 7 2 4 4 = 2 7 = * 2600 4 0-2 - = 2 4 8

28 = 2 2 2 2 = 8 2 6 0 - = 20 020 = 2 2 6 6 2 = 9

22 7 2 2-2 7 2 2 7 7 7 + 2 22 7 7 + 2 = 96

2 20 2 2 2 2 + 2 2 + 2 = 20 20 + 2 20 + 2 = 2

60 = 2 2-2 - 2 - = 6 4 2 6 4

+ 0 - = 49 2 49

80 = 2 00 2 2 0000 2 = 0

20 [ 8 6 ] 20 = 620 9 = 600

0 = 20 2 20 20 = 2 0 20 + 2 = 20 = 2 0 = 20 2 0 + 2 = 0 2 2 = 0 2 2 8 2 2 8 2-2 8 = 2-7 2 = 4 2

8 8 2 8 2 8 8-2 8 = 2 2 = 8 = 4 2 0 8 0 4 4 = 2 4 0 4 +0 2 4 = +0 = 0 0 6 = 9

0 0-4 - 4 0 = 6-4 = 9-4 = 4 4 4 + 4 4 [2 - + 4 4 4] = [2-7 4 4] = [2-28 ] 4 = 8 4 = 2

* 60 0 60 0-0 = 7 0 7 60 = 900 0 900 = 270 0 270-2 = 270 = 08

6 0 6 0 + 0 = 0 6 0 = 20 20 - = 4 4 20 = 0 6 + - 2 0 = 6 4 2 0 = 600

2 0 4-2 = 8 + 2 = 8 2 8 2 2 = 7 [ 8 + 2-2] 2 2 = 2 = 0

2 2 - = 2 2 2-2 2 2 2-2 = 20 2 2 [ 2 - - ] = 2 0 = 20 * 2 2 2 2 2-2 - = 2 2 2-2 2 = 0 = 2

- = 2 2 28 = 42( [2-2 - + ] - 2 2 = [0 + ] 2 = 28 = 42

x =.4 2.8 x = 6

2 8 4 02 6 8-6 8-6 8-6 = 7 8-6 = 42-8 48 = 7 24 7 24 2+02-4 = 9 7 9 = 68 24

2 + 02-4 - 8-6 7 = 9 24 = 68 2 4 8 8-7 2 8

2 87 420 2 4 420 = 40

- 4 = 2 = 80 2 8 - / 2 2-2 = 6 6 6 = 6 6

6 2-6 6 2 - = 8 6 6 4 0.4 6

- = 4 6 8-4 - 8 = 8 0.4 8 0.4 =.2 8 0.4 [ ( ) ] 4 4 6 = 0.4 8 2 2-2 = - 2 = +

4 + 4 = = 9 9 4 9

S + S = S = 2 S ABD ABCD S + S = S + S + S 2 4 6 = 2 S ABCD

2 4 4 4 4 = 4 4-2 4 4 4-2 2 = 4 2 2 2 + = 20 = 6 2 20

6 2 2 6 2 = 2 9 0 = 270 9 9 2 2 2 2-2 2-2 2-2 2-2 = 2 = 60 4 60 60 = 00 + 4 4

00 + 4 9 = 00 20 0 + = 0 6-6 = 6 0 6 0 = 80 6 2 2 8 8 = 2 2

- 2 = =

* 276 6 2 276 = 20 6 2 276 = 84

2 4 4

4 4 4 2-2 - 2 = 2 = 90 90 = 8 20 + 20 4 + + 4 + + 40 0 4 = + 2 + = 4

* 60 0 60-4 = 60 = 04-04 - 0 0 04-0 7 = 04 0 60 - - - 60 0

8 8-8 = 8 8 = 88 8

- = 2 4 - = 2 - = 6 8 6 8 6 8 = 48 6 48 = 24 2

* 20 2 7 - = 2 20 = 00 7 7 = 7 7 7 - = 2 2 = 2 2 = 2

= 4 = 4 = 7 4 = 4 * 270 80 4 4 270 = 62 8 4-4 80-270 - 4 = 80-62 20 20 = 8 = 20

y x = k x 0 = 2 4 4x = 02 02 x = 4 = 240

000 x = 20 8 20x = 0008 x = 000 8 20 x = 2 x 8 = 2 2x = 8 x = 8 2 x = 807 2 4 2 2 2 = 4 6 2 2 2 = 4 2+4-4 - 6 2 + 4-4 - 6 7 = 2 = 60

2800x = 2004 2004 x = 2800 x = 2. 27x = 0 8 08 x = 27 x = 20 0x = 26 x = 2 6 0 x =

0x = 6008 x = 600 8 0 x = 2880 600-2880 = 720 4 70 4 4 4 = 4 8

4 70 = 40 7 70 = 0 7 8 70 = 80 7 6 - = - = 4 = 8 0 2 0 = 4 2 +

8 4 = 8 2 4 8 8 0 = 80 8+ 2 + 2 0 = 20 8+ 2 + 0 = 0 8 + 2 +

20 = 4

20 = 4 6 4 0 2 = 6 4 = 2 6 4 = 0 2 = 6 0 2

480 = 600 + 0 + 2 0 480 = 400 + 0+ 2 2 480 = 480 + 0+ 2

2 6 7 4 6 2 20 2 20 = 0-2 7 = 7 0 = 42 7

- 6 0 2 = 0 2 = 20 = 20 20 * 20 7 7 7-7 = 4 7 4 20 = 640 7 7-7 = 4 7 4 640 = 200 7

7 200 = 60 60-20 7 4.4 6 6-6 0 -.4 0 0 4 44. = 76 2 / 76 2-7 = 9 2

= 76 2 7 = 9 2 9 2 * 70 6 70 = + + 6 70 = 2 + + 6 6 70 = 0 + + 6 2 260 4 2 ( + ) 2 4 260 ( ) 4

260 ( ) 4 = 260 60 = 200( ) * 4 9 2 0 9 4 0 4 4 = 4 4 9 4 9 2 = 0 0 0 9 2 ( ) = 20( ) 4 0 20 = 60( ) 4 9 20 + 2 = 60( ) 0

* 220 2 ( ) ( ) 2 2 2 ( ) ( ) 2 2 2 2 2 2 2 = 8 2 4 = ( ) 2 4 2 = 220 + = 00

4 4 + = 7 = 4 7 28 ( ) 7 28 ( ) 7 28 = 28 = 420( )

2 2 - = 2 4 4 92-22 = 0

2 ( ) = 2 = 2 0.6 0.6 = 0.4 = 6 ( ) 0.6 - = 4 2. ( ) =. =. = 6

+ + 0 7. 2 =. + = 6 ( + + 6 0 0 7. ) = 6 7 = 6 =. ( ) 72 = 80 0 ( 0 8 ) = 80 = 80( ) 72 ( 90) 80 = 72 2 = 44( )

2 * 4 6 9 4 4 2 9 2 6-4 ( ) = 4 9 4-4 = 2 9 2 4 + 6 = 24

2 * 2268 708 4 2 4 = = 4 = 4 64 2 7084-2268 4 - = 282-2268 = 64 = 940 2 4

20 6 6

6-6 - + 620 6 620-6 + = 620 6 = 20 0 0 2 + 0 0 = 60 2 + = 60 = 2 / 20 + 20 = 2 / 0

2 48-48 = 2 96 60 60 96 60 = 760 96 = 2 6 = 6 6 2 680 4 2 4 = 2 4 = 2 4 2 = 4 = 9 8

9 8 680 + 9 8 680 + 9 8 7 = 680 8 = 20 9 20 = 60 8 6 9 6 + - = 8 9 9 8 407-6 9 7 = 9 9

ACDF 60 AC = x AF = 60 x AG = 4 + 60 ABHG 60 x 4 + 60 x = 60 x

9 9 6 6 6 6 0 +

0 + = 80 6 80 6 = 0 6 6 6 0 = 0 6 0 = 80 0 = 80 6

4 = 7. 8 x = 00 80-00 x = 6.28 4 0 + 0 = 6 = 6 6

4 270 4-4 = - = 4 4

4 4 4 4 72 2 8772 +.4( ) 2 2 2 = 6264 + 4069.44 = 0.44

AD = BD = CD = 2 BC = S = 2 ah ABC S = BCAD ABC 2 = 6 2 = 9 4 S = r 2 π n cm 4 60 2 4. 2 4 2 = 7.06cm 60

2 4 8 0 20 6 4 20-20 6 4 4 80 = 20 4 6 80 = 240 6 = 8 6 6 4 4 0.2 4 0.2 [- - - ] = 0.2 [ 4-4 4 ] 4 = 0.2 [ 4 - ] = 0.2

4 4 4 4 0.2 0.2 = [ - ] 2 = [ - ] 4 = [ ] 4 = 20

- 2 = 4 4 = 20 4 2 2400 2400-0 - 2 2 0 = 2400-4 7 0 0 = 2400 0 2 0 2 0 = 20

2 440 440 2-400 = 260-440 8 2 60 60-2 2 60 - = 00-00 - = 60 8 8

60-2 - 8 = 00 8 = 60 2 2 8-2 = 8 8 60 60 = 60 8

- 2 = 9 0 0 0 =.

88.4 2.4.4 = 88.4 2.4 = 94.2 = 282.6 2 4 - - - 2 4 2 = 4 = 0 0

024 024 2 4 - = 40 0 40 4-60 - 4 [4-4 -] = 60 60 60 60 60 4 60-4 60 = 4

20000 x x 0-4 20000 + (+ 20000 0-4 20000 + +

x 20000 + x 20000 x + + + x = 20000 x = 2000 + x = 000 480 4 480 x 480 x + 4 480 480 x (+ 4 ) x x + 4 x = 480 + 4 x = 480 4 x = 600 000

(- ) (- ) [ ] 000 (- ) x (- ) x x = 000 - = 4000

2 2 7 4 2 2 0-9 2 + 2-2 - 2 7-4 - 2-2 7 - x = 2 + 2 4 x = 2+ 2 (- 2-2 7-4 ) 9 x = 27 40 x = 420 0 0 2000

y = 0x 2-2 = 0 2 2 0.7 = 0 0.2 = 07 = 220 + 2 2 + x + 2 + + 2 + + 2 + x = x = + 2 + x = 0 2 + 8 = 20 20

20 2 = - = 2 2 2 2 2 = 0 0 = 8 x = 24 x = 2 4 = 2.6

2 2 6 6 2 + 6 2 ( 2 + 6 4 = 2 6 = /

+ 2 2 = 6 2 = 0.8 2. 6-0.8 = 6-4 = 0 0 0 =

A B 6 2 6 6-6 = 6 4 = 24 6 24 = 20 6 60 80 4 7 60 7 4-7 7 7

- 7 = 4 7 4 60 = 680 7 60 +80 4-7 4 = 40 4 7 4 = 60 7 = 680

0 0 0 420 + = 420 + 0 = 4200 = 4

4 4 + 4 4 9 4 + 9 8 = 4 9 4 8 = 6 9 46-20 4.- 7 = 44.- 7 = 76 2 7 = 9 2

* 08 4 8 2 8 4 8 4 = 4 2

8 = 08-4 8 4 + 8 2 = 6 4 + = 69 = 7 6 24 6 ( + ) = 24 6 48 48 ( + ) 24 6 = 48 = 9 ( ) 4 0 20 + 0 20 0 ( + ) 4 20 0 4

( + ) 4 20 0 2 = + 4 60 = 4 2 = 9( ) ( ) = 2 8 0 8 ( + ) 2 0 8 ( + ) 2 0 8 9 = 2 40 9 = 20

6 2 ( + + ) 6 2 ( + + ) 6 2 = 8 8 8 = + = 8 24 8 24 6 = 6 6 ( + ) 8 8 = 6 9 * 40 8 7 = 8 8 7 9 ( ) 2 = 8 40 0

= 0( ) 0 9 [( ) 2] 8 40 7 27 = [( ) 2] 8 40 = [ 2] = 0 = 0( ) 4 = 4 2 2 ( + ) = ( ) 4 7 2 = 2 7 7 24 7 24= 68( ) 7 24 ( 4 ) [ ( + 4 )]

24 = 7 [ ] 2 2 24 = 2 ] 2 7 = 24 7 = 68( ) 20 4 = 4 7 20 = 0 7 0 = 0 0 0 = 9( ) 0 0 4 20 4 ( ) 0 = 4 0 0 = 4 9 = ( ) =

( 6) = 2 = 9 4 4 = = 9 9 9 4 2 = 0 9 4 (- ( - 6) 9 ) ( ( - 6) - ) = 4 2 9 4 = 0 487 + 487 487 4 = 487 = 4 4 ( + ) ( + ) = 4

4 60 0 ( ) 70 60 70 0 ( - 60 70 ) = 4200 200 4 200 [200 + ] 4 = 400020 = 6 20 4 ( + ) 20 4 [ ( + )] 20 4 = [ ] 20 4 = 6 = 6 ( )

- 2 = 60 2 2 2 2 = 0-2 2 = - 2 = 4-2 = - 2

- 2-2 - 2 = 2 = 7-0 - 2 = 2 = 7-0 2-2 0( ) 2 = 0 2 = 4 6

4 + 0-2 = 0 2 = 4 6 4 4 6-2 - 2-2 = 2 = 6 4 6 - - 2 = 2 = 6 4

4-2 4 (- 2 ) = 4 2 = 49 6 + - 2 = 4 2 = 49 6 49 6 - - 2 2 20-2 20-2 = 20 2 = 2 9 + - 2 = 20 2 = 2 9

+ 4-2 = 0 2 = 4 6 ( ) 2 9 4 6 2-0 - 2 0-2 = 0 = 0 0 2-4 - 2 = 0 = 0 0 2 = - 2

- - 2 = 40 2 = 4 7 0 4 7-2 - 2-2 = 2 = 6 4 6 4 4-2 = 20 = 2 9 2 4 2 9

40-4 6 + 9 6 2 = 4

40-4 4 4 6 40-6 40-2 2 -.4 2 2 4 60 = 4 -.7 = 2.4

40-27 90 4 +8 = 2. 2.4 0 0 = 706. 4

S = S -S =.4-0 2 =.

9 -.4 2 4 = 8-4. =.87 6 2.4 2 = 4. 2 2 2.4 [ 9-2] -.4 2 =.4 9-2.2 = 2.9

2 2 8 2 4 2.4-.4 +.4 2 2 2 =.4 6-6 + 4 =.424 = 7.6