Tung Wah Group of Hospitals Kap Yan Directors' College Forum

[YOUNG]

https://emm.edcity.hk/media/Pyramids+and+spheres/0_x27ga97h/172368882

Through a simple experiment, it is demonstrated that the water contained in a prism is three times the water contained in a pyramid with the same base and height. This shows that the volume of a pyramid is one third of the volume of a prism with the same base and height.

The programme uses a pyramid with a rectangular base as an example to illustrate the calculation of the volume of a pyramid. By comparing the material used for making a pyramid and a prism with the same base and height, the calculation of the surface area of a pyramid is demonstrated. It also points out that the difference in their volume is much greater than the difference in their surface areas.

The programme highlights the special shape of a circular cone when it is spread out flat. The formula for the curved surface area of a circular cone is introduced. It also shows the relation between a frustum and a pyramid. The method of calculating the volume and surface area of a frustum is clearly elaborated with an example. Finally, the programme puts forward a scenario of save the environment to introduce the formulas for the volume and surface area of a sphere and their applications.
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Miss YOUNG