Question

find the angle in degrees subtended at the centre of a circle by an arc whose lenght is 2.2 times its radius.

Answer 1

$$\begin{gathered} \mathrm{Here}\mathrm{Arc}=2.2\times \mathrm{radius}, \\ \mathrm{Angle}=\frac{\mathrm{Arc}}{\mathrm{radius}}=\frac{2.2\times \mathrm{radius}}{\mathrm{radius}}=2.2\mathrm{radian} \\ =2.2\times \frac{180}{\mathrm{\pi }}=2.2\times \frac{180}{22}\times 7=126\mathrm{degree}. \end{gathered}$$