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
Answers
Answered by
1
Answer:
r is ur answer hope it helps hu
Answered by
32
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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