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Byju's Answer
Standard X
Mathematics
Length of Arc of a Sector
Find the peri...
Question
Find the perimeter of a sector whose radius and central angle are
18
cm and
210
o
respectively.
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Solution
Perimeter of sector
=
θ
360
°
×
2
π
r
+
2
r
=
210
°
360
°
×
2
×
22
7
×
18
+
2
×
18
=
66
+
36
=
102
c
m
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