A graphic method for drawing the shaded parts of geometric figures using geometric sketchpad

Geometry Sketchpad is a powerful geometric drawing software that can easily draw various geometric figures. However, many users may encounter difficulties when it comes to drawing shaded portions of geometry. PHP editor Xiaoxin brings you the graphic method of drawing the shadow part of geometric figures with geometric sketchpad. The article introduces the operation steps and techniques in detail.

Step 1 Draw a triangle with inscribed circles

Open the drawing tool, click the custom tool button on the left sidebar, and select [Triangle] - including inscribed circles in the pop-up tool menu triangle.

After selecting the above tools, click the mouse in the workspace to pull out a triangle (as shown in the picture). Next, we'll shade the triangle and its inscribed circle.

Step 2 Construct the shadow of the geometric figure

First construct the shadow interior of the triangle and circle respectively. Select the three vertices of the triangle and execute the [Construction]-[Triangle Interior] command, so that the interior of the triangle will be colored. Then click the circle with the mouse, execute the [Construction]-[Inside the Circle] command, and color the circle as well.

Currently, we want to set the color inside the circle to white and the same as the background. Select the inside of the circle, right-click and select [Color] - Other, click white in the pop-up dialog box, and click OK. At this time, I found that the inside of the circle could not be completely white because this layer was transparent. How to set it to opaque?

Right-click the mouse inside the circle, click Properties, set the opacity to 100% in the pop-up dialog box (as shown in the picture), and click OK. Then hide the relevant points and change the interior color of the triangle to yellow to get the required geometric figure.

The above is the detailed content of A graphic method for drawing the shaded parts of geometric figures using geometric sketchpad. For more information, please follow other related articles on the PHP Chinese website!