Question

The angle subtended at the centre of a circle of radius 3 metres by an arc of length 1 metre is equal to.

• A. 20°
• B. 60°
• C. $\frac{1}{3}$ radian
• D. 3 radians

Answer 1

Answer: (C)

$\frac{1}{3}$ radian

Answer 2

Given that radius $(r) = 3m$and arc $(d) = 1m$

We know that $\text{Angle} = \frac{\text{arc}}{\text{radius}} = \frac{1}{3}radian.$