1.
Find the length of the arc of circle of
diameter 6 cm, if the arc is subtending
and angle of 120° at the center
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Answer:
Given
⇒ Length of an arc =20πcm
⇒ θ=144
o
⇒ Length of an arc =
360
o
θ
(2πr)
Where, θ is angle subtended at a center.
2πr is circumference of a circle.
∴ 20π=
360
o
144
o
×2πr
∴ r=
4
100
=25cm
Step-by-step explanation:
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