1. Make a horizontal line, and select the initial current point and press [Ctrl+H] to hide it. Use the point tool to construct points O, E, and F on a straight line. Select point O and point E, select [Construction] – [draw a circle with the center of the circle and the circle] as the circle OE with O as the center of the circle, and make concentric circles OF in two ways.
2. Use the point tool to take point G on the large circle, and use the line segment tool to connect the OG to the small circle at point H. Select point H and line, select [Construction] – [Parallel Line] to make a parallel line of the straight line EF through point H, and use the same method to pass point G as a vertical line of the line, and the two lines intersect at point M.
3. Select point G and point M, select [Structure] – [Trajectory], and an ellipse appears.
4. Use the point tool to take any point A on the ellipse (you can’t take the key point F), select point A and line EF, select [Construct] – [Perpendicular line], pass A as the perpendicular line of the straight line EF, use the point tool to take any point B on the perpendicular line, select points A and B, and press [Ctrl+F] to construct the line segment AB.
5. Select point A, line segment AB and point B (pay attention to the order), select [Transform] – [Marker Vector], select point O, select [Transform] – [Translate], translate point O to point C according to the marker vector, and connect with AO, CO, and BC using the line segment tool. Form a visual diagram of a rectangular ABCO.
6. Select the line segment to AO, right-click to modify the color to red, and change the line segment CO and BC to a different color in the same way. Select the line segment AO, AB, or BC, and select [Display] – [Track Line Segment] to implement the tracking function.
7. Select point A and select [Edit] – [Operation Button/Animation] to implement the animation function. Select all graphics except the rectangular ABCO and press [Ctrl + H] to hide them.
8. Click the [Animation Point] button to see the cylinder formed by the rotation of the three line segments AO, AB, and BC for one week.
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