1

, 9. , 1 .

. SAB , ;(< S=90) SO ; ; SAB, AS=SB, SOAB.

=1

2 ;

9 =1

2 1

= 18 : 18 .

2

, 4, 3. .

1

,

. 23. .

, ;

= . 23. : (

1 . , 14 .

, .

= = +3(;

) =

2;

=

2

=1

2

= 38

.. :

3 = = );

3 =

3 = 1

3 = 138

: 138

1

3 7.

5. .

1)

; AO = 7;

= +; = ;

=2=27=14.

= ; = 2 = 2 = +

= + 8

2) .

; .

= = + 3 8

3) =( D):2=(14 6):2=4.

4) . :

=

= = 2 1 = 9+

= . 9 = +8

( 38

5) :

3 = =

2 ;

3 =1

2 = +8

: +8

2

3 6, 4.

.

1

,

, , .

.

.

()(,

.

LAC (L ). AKLC

.

AKLC ,

KL, KL .

2 , N,

C, D.

1) N AD NC.

.

2) ( ).

3) , .

4) N ( ).

5) 33 8

, b,

.

, .

.