Question

the radius of a circle is 4 cm what is the measure in radians of the angle subtended by an arc Pi centimeters long

Answer 1

$\text{Length of arc in (radian) = }\theta r$$L\text{ = }\pi cm,\text{ r=4cm}$$\begin{gathered} \pi\text{ = 4 x }\theta \\ \theta=\frac{\pi}{4} \\ \text{The angles measured in radian subtended by the arc is }\frac{\pi}{4} \end{gathered}$