Mithra made the craft in the paper. It is shape like a sector of a circle.. The inner and outer radii are \(3 \ cm\) and \(5 \ cm\) respectively. The craft has three colours, i.e., red, blue and green. (Use \(pi=\frac{22}{7})\).
Based on the above information, solve the following questions:
1. If the region containing blue colour makes an angle of \(80^\circ\) at the centre, the area of the region having blue colour is:
2. If the region containing green colour makes an angle of \(60^\circ\) at the centre, the area of the region having green colour is:
3. If the region containing red colour makes an angle of \(20^\circ\) at the centre, the perimeter of the region containing red colour is:
4. The region given in the figure represents: