How to implement the geometric sketchpad cylindrical rotating body

Are you confused about how to implement the operation of the cylindrical body of rotation in the Geometry Sketchpad? PHP editor Zimo delves into this topic and will provide you with a step-by-step guide on how to use Geometric Sketchpad to create a realistic cylindrical body of revolution. In this article, you'll learn about basic shapes, rotation operations, and texture application. Ready to take your geometric drawing to the next level with this helpful tip? Continue reading below for detailed instructions.

1. Draw a horizontal straight line, select the initial point and press [Ctrl+H] to hide it. Use the point tool to construct points O, E, and F on the straight line. Select point O and point E, select [Construction] - [Draw a circle with the center and points on the circumference] to create a circle OE with O as the center, and use the two methods to create a concentric circle OF.

2. Use the point tool to pick point G on the big circle, and use the line tool to connect OG to the small circle at point H. Select point H and the straight line, select [Construction] - [Parallel Line] to make a parallel line of straight line EF passing through point H. In the same way, draw a perpendicular line of the straight line passing through point G. The two lines intersect at point M.

3. Select point G and point M, select [Construction] - [Trajectory], and an ellipse will appear.

4. Use the point tool to pick any point A on the ellipse (key point F cannot be taken), select point A and straight line EF, select [Construction] - [Vertical Line], and pass A is the vertical line of straight line EF, use the point tool to pick any point B on the vertical line, select points A and B, and press [Ctrl+F] to construct line segment AB.

5. Select point A, line segment AB and point B in sequence (note the order), select [Transform] - [Mark Vector], select point O, select [Transform] - [Translation], translate point O to point C according to the marked vector, and use the line segment tool to connect AO, CO, and BC. Form a visual diagram of the rectangle ABCO.

6. Select the line segment to AO, right-click and change the color to red. In the same way, change the line segments CO and BC to different colors. Select the line segments AO, AB, and BC, and select [Display] - [Tracking Line Segments] to implement the tracking function.

7. Select point A and select [Edit] - [Operation Button/Animation] to implement the animation function. Select all shapes except the rectangle ABCO and press [Ctrl + H] to hide them.

8. Click the [Animation Point] button, and you can see the cylinder formed by the three line segments AO, AB, and BC rotated once.

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