radius of a circle is 12 CM measure of an Arc of a circle is 30 degree find the area of sector. (π=3.14)
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Answer:
l
=
6.28
c
m
Explanation:
The formula for the length of an arc of a circle is:
l
=
θ
360
o
(
2
π
r
)
Where:
θ
is the angle subtended at the centre.
2
π
r
is the circumference of the circle.
the circumference
2
π
r
=
(
2
)
⋅
(
3.14
)
⋅
(
12
)
=
75.36
c
m
So, length of arc
l
=
θ
360
o
⋅
(
2
π
r
)
l
=
30
360
o
⋅
(
75.36
)
l
=
75.36
12
l
=
6.28
c
m
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