How to draw a semicircle using geometric sketchpad

1. Open the geometric sketchpad, click [Customize Tools] - [Triangle] - [Right Triangle], click the mouse on the canvas, and then drag the mouse to draw a right triangle.

Example of using custom tools to draw a right triangle

Use the [Move Tool] to select the three vertices of the right triangle, and click the menu [Build]—— An arc passing through three points results in a graph as shown in the figure below.

Select three vertices of a right triangle to construct an arc passing through three points. Example

3. Select the two right-angled sides of the triangle, right-click and select [Hide Line Segment] , the semicircle is now created, as shown in the picture below.

Select the two right-angled sides of the right triangle and execute the hide command

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