Perimeter of regular pentagon = \(100\) \(cm\)
\(\Rightarrow 5 \times side = 100\) \(cm\)
\(\Rightarrow Side = \frac{100}{5}\) = \(20\) \(cm\)
Thus, the side of regular pentagon is \(20\) \(cm\).
Complete the drawing shown in Fig. 9.14 to indicate where the free ends of the two wires should be joined to make the bulb glow