Calculating the Surface Area of a Cylinder

This example demonstrates how to calculate the surface area of a cylinder. The core mathematical concepts involved include the area of a circle, the circumference of a circle, and solid geometry. Construction highlights: using GeoGebra commands/objects like Circle (draw circle), Point (point), Segment (segment), Polygon (polygon), Intersect (intersection), Rotate (rotation); objects include a, A, c, r, D, C, F, pic1, pic2, G, b, E, poly1, d, c_1, f, e, B, H, g, I, I', text1, text2, h, text3. Suitable for middle school and above students learning solid geometry and surface area calculation.