As a professional mathematical drawing tool, Geometric Sketchpad can draw various geometric figures, such as a pyramid. The specific steps are as follows:

1. Draw a triangle ABC with the line segment tool.

2. Draw line segment AD with line segment tool, and draw point A' on line segment AD with point tool, as shown in the figure.

3. Select points D, A and A' in turn, and select transformation-marking ratio-marking ratio DA'/DA as the scaling ratio. Double-click point d to mark d as the zoom center. Select triangle ABC (except point A), and then select Transform-Zoom to get a new triangle A'B'C'.

4. Connect C' and C, click B and B' with the line segment tool, select line segment AA', select Construction-Line segment, select line segment AD, and press Ctrl+H to hide line segment AD. Select line segment CC', line segment AC and line segment BC, and right-click to set the line types as "thin line" and "dashed line" to finish drawing.

The above content introduces the method of drawing triangular prism with geometric sketchpad, mainly using the drawing ratio and transformation function of geometric sketchpad. The geometric sketchpad transformation function is also very practical, which can realize the transformation of many graphics. For more drawing skills of Geometer's Sketchpad, please visit Geometer's Sketchpad Chinese official website to learn.