Answer:
Step-by-step explanation:
⇒ Length of an arc =
4
aπ
cm
⇒ Radius of a circle =a.
360
o
θ
(2πr)
Where, θ is angle subtended at a center.
2πr is circumference of a circle.
∴
=
×2π×a
∴ θ=
180
=45
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Answers & Comments
Answer:
Step-by-step explanation:
⇒ Length of an arc =
4
aπ
cm
⇒ Radius of a circle =a.
⇒ Length of an arc =
360
o
θ
(2πr)
Where, θ is angle subtended at a center.
2πr is circumference of a circle.
∴
4
aπ
=
360
o
θ
×2π×a
∴ θ=
4
180
o
=45
o