The specific method of using Geometric Sketchpad to create an animation of folding a circle along its diameter.

How to animate a circle folding along its diameter through Geometry Sketchpad? PHP editor Xinyi brings you a detailed tutorial to explain the specific steps of creating an animation that folds a circle along its diameter in the geometric sketchpad. This tutorial will walk you through the step-by-step process of creating this vivid animation, allowing you to easily demonstrate the geometric properties of a circle.

1. Draw circle O. Use the [Circle Tool] to draw a circle in the blank area of ​​the artboard, with the center of the circle being O.

2. Make the diameters AB and CD that are perpendicular to each other in the circle O. Pick a point A on circle O, select points O and A, execute [Construction] - [Straight Line], and the intersection point of the straight lines is B. Construct line segment AB and hide the straight line. Select point O and line segment AB, execute [Construction] - [Perpendicular Line], and the intersection points with circle O are C and D. Construct line segment CD and hide the vertical line.

3. Construct arc. Pick any point P on AB, select points C, P, and D in sequence, and execute [Construction]-[Arc passing through three points] to create an arc.

4. Make operation buttons. Select points P and A in sequence, execute the [Edit]-[Operation Button]-[Move] command, and change the label to [Collapse]; similarly select points P and B in sequence, execute [Edit]-[Operation Button]- [Move] command, modify the label to [Restore]; select two operation buttons, execute the [Edit]-[Operation Button]-[Series] command, modify the label to [Collapse Circle], and execute them in sequence.

5. Hide redundant objects and complete the graphics production.

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