find the lenght of an arc of a circle of radius r cm which substends an angle 0 degree at the centre of the circle ?
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Answer:
Step-by-θ=30
o
and r=4cm
⇒ Length of an arc =
360
o
θ
(2πr)
Where, θ is angle subtended at a center.
2πr is circumference of a circle.
⇒ Length of an arc =
360
o
30
o
×2π×4
⇒ Length of an arc =
12
2π×4
∴ Length of an arc =
3
2π
step explanation:
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