find the length of an arc of radian 3cm if the angle subtended at centre is 30 degree
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Given : the angle subtended by arc at the centre is 30 degree
Radius of circle is 3 cm
To Find : The length of an arc
Solution:
length of an arc = ( arc angle / 360° ) circle circumference
circle circumference = 2πr
r = radius = 3 cm
arc angle = 30°
length of arc = ( 30°/ 360° ) 2π (3)
=> length of an arc = ( 1/12) 6π
=> length of an arc = π/2
Using π = 3.14
=> length of arc = 3.14/2 = 1.57 cm
The length of arc = 1.57 cm
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