38
"
1974"
x
x
x
x
x
x
x
(
) !
x
10 .
( 21)
(y) / (l)
1. / (l)
2.
x
x 150
x
x ()
x
x
x
x
( 1, 2, 23)
:
250 . 30 .
1. (e) (u)
2. 0°
3. (c, v)
4. (a) (cc)
5. (l)
6.
(s)
7.
( 1, 2, 24)
1. (e) (u)
2. 10º, 15º, 22.5º, 31.62º 45º
50º
3.
4.
:
( 1, 2, 25)
3º 48°
45°
1. (k)
(v)
(p)
2. (p)
3.
( 60)
:
( 3)
1.
2. (gg)
:
( 3)
1.
2.
(jj) (
)
,
( 26, 27)
“”
26.
45°
90°
( 26 & 27)
180°
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