A simple tutorial on drawing concentric circles using geometric sketchpad

Step 1 Make concentric circles

Open the drawing board, click the [Circle Tool] on the left toolbar, click the mouse in the blank area of ​​the drawing board to determine the position of the center of the circle, move the left mouse button to determine the radius length, and click Use the mouse to draw a circle. Then move the mouse to the center of the circle, hold down the left mouse button, and drag outward until the radius is appropriate and release the mouse, thus drawing concentric circles.

Step 2 Adjust the concentric circles

1. Adjust the size of the concentric circles

Click the [Move Arrow Tool] on the left toolbar and hold Concentric Drag the center of the circle to change the size and position of the concentric circles,

2. Adjust the size of the large circle

Click the [Move Arrow Tool] on the left toolbar and press Drag the red dot on the edge of the large concentric circle to change the size and position of the large circle.

3. Adjust the size of the small circle

Click on the left toolbar [ Use the Move Arrow Tool and drag the red dot on the edge of the concentric circles to change the size of the circles.

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