
– 15 –
110
T
= 2 (
R> 0)
π
R
g
111
R
A
a
0
sin A
a
=
2R
( )
0˚
< A < 180˚
R > 0
112
[
]
a
= 2
Rsin A
sin A
a
=
2R
[
]
2sin A
a
R =
(0˚<
A
< 180˚,
a
> 0 )
113
sin A
a
sin B
b
= = =
2
R
sin C
c
V
= r
3
( r > 0)
4
3
115
I = ( r > 0)
P
4 r
2
π
116
S = 4 r
2
( r > 0)
π
117
118
T = 2
π
m
k
(m > 0, k > 0)
π
( )
114
C
L
IA
R
T
L
S
L
T
L
= R tan
I
A
2
C
L
=
·R·I
A
180
π
S
L
= R –1
1
cos
I
A
2
v
0˚< A, B, C < 180˚
a, b, c, R > 0
( )
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