Geometry | Surface Area of a Sphere & Hemisphere

The video tutorial explains how to calculate the surface area of a sphere and a hemisphere. It begins with an introduction to the concept of surface area, using the formula 4πr² for spheres. An example is provided with a sphere of diameter 10 mm, demonstrating the calculation process. The tutorial then transitions to hemispheres, explaining the additional complexity due to the circular base. A step-by-step example is given for a hemisphere with a diameter of 14 cm. The video concludes with a brief discussion on the calculus connection between volume and surface area formulas.

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