Question

The length of an arc of a circle of radius r which subtends an angle of 1 radian at the centre of the circle is: *
r/2
r
1/r
2r/ π​

Answer 1

Answer:

r is ur answer hope it helps hu

Answer 2

Solution :-

Basic Method :-

→ π radian = 180°

so,

→ 1 radian = (180/π)°

and,

→ Radius of circle = r unit .

then,

→ Length of arc = (Angle at centre/360°) * 2 * π * radius .

→ Length of arc = [(180/π)/360] * 2 * π * r

→ Length of arc = (1/2π) * 2πr

→ Length of arc = r (B) (Ans.)

Direct Formula :-

→ Length of arc = Angle at centre in radian * radius of circle

So,

→ Length of arc = 1 * r

→ Length of arc = r (B) (Ans.)

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