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G
B
I
A
=
r
2
⋅
π
⋅
α
360
r
=
A
⋅
360
α
⋅
π
α
=
A
⋅
360
r
2
⋅
π
b
=
2
⋅
r
⋅
π
⋅
α
360
r
=
b
⋅
360
α
⋅
π
⋅
2
α
=
b
⋅
360
r
⋅
π
⋅
2
Geometrie-Kreis-Kreissektor (Grad)
A
=
r
2
⋅
π
⋅
α
360
1
2
3
4
5
6
7
8
r
=
A
⋅
360
α
⋅
π
1
2
3
4
5
6
α
=
A
⋅
360
r
2
⋅
π
1
2
3
4
5
6
b
=
2
⋅
r
⋅
π
⋅
α
360
1
2
3
4
r
=
b
⋅
360
α
⋅
π
⋅
2
1
2
3
4
α
=
b
⋅
360
r
⋅
π
⋅
2
1
2
3
4
Beispiel Nr: 04
ä
Gegeben:
Kreiszahl
π
[
]
Fläche
A
[
m
2
]
Radius
r
[
m
]
Gesucht:
Winkel
α
[
∘
]
α
=
A
⋅
360
r
2
⋅
π
Gegeben:
π
=
3
16
113
A
=
35
m
2
r
=
5
m
Rechnung:
α
=
A
⋅
360
r
2
⋅
π
π
=
3
16
113
A
=
35
m
2
r
=
5
m
α
=
35
m
2
⋅
360
(
5
m
)
2
⋅
3
16
113
α
=
160
∘
A
=
35
m
2
3
,
5
⋅
10
3
d
m
2
3
,
5
⋅
10
5
c
m
2
3
,
5
⋅
10
7
m
m
2
7
20
a
0
,
0035
h
a
r
=
5
m
50
d
m
500
c
m
5
⋅
10
3
m
m
5
⋅
10
6
μ
m
a
l
p
h
a
=
160
°
9
,
63
⋅
10
3
'
5
,
78
⋅
10
5
''
178
g
o
n
2
4
5
r
a
d
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