. .
. .
, .
: . 1 / 360 . 60 (: 10 = 60'); 60 (: 1' = 60'').
900 ; , 900, ; 900, .
, , K , : AB MK.
, , . , 1800.
, , . .
, .
: .
.
1. , 200 .
:
, +200. , 1800.
+( +200)= 1800. 2 =1600, =800.
800 +200 =1000
: 800 1000
2.. . . .
:
. , 1800. 1800 .
: + (1800 ) =900.
28.
: 16 +7(1800 )= 28900
16 + 71800 7 = 28900
9 = -71800 + 28900 9.
= 7200 + 28100
= 1400 + 2800
= 1400 - , 1800 1400 =400.
: 1400 400
3. , 2800 . .
:
. .
. 1800 . : , , 1800 , 1800 .
: + + (1800 ) = (1800 )+ 2800.
2 =2800, =1400, 1800 1400 =400
: 1400, 400, 1400 400
4. a b 170, a c 330
b c.
:
:
)
(b,^c)= 170 + 330=500
)
(b,^c)= 330 - 170 =160
: 500 160
5. . 110º. , .
|
|
:
:
)
Ð = 700: 2 =350
)
Ð = 1100: 2 =550
: 550 350