- ? as the Ratio Between Circumference-Circle & Diameter
- Finding the Circumference of a Circle Using Formula
- Area of a Circular Region
- Measurement of the Circumference of a Circle
- To find area enclosed by two concentric circles whose radii are given

- Surface Area of Cuboids
- Surface Area of Cubes
- Surface Area of Triangular Prism
- Problem on Surface Area of Triangular Prism
- Surface Area of pentagonal Prism