Although the geometric sketchpad is an auxiliary tool for learning mathematics, many symbols can't be typed on the geometric sketchpad at once. You need to use other tools to make angle symbols in the geometric sketchpad, as shown below:

Method 1: input through the symbol panel.

Step 1: Open the Geometric Sketchpad, select the "Text Tool" in the left toolbar, click the Sketchpad with the mouse, and then drag out a text box or double-click the Sketchpad to pop up a text box;

Step 2 At this point, a text toolbar will pop up at the bottom of the sketchpad. Click the symbol panel to pop up the mathematical symbol toolbar. Click the angle symbol to print the angle symbol.

Method 2: With the help of Chinese input method

First, select the text tool, then press and hold the left key to drag out a text input box that needs to input angle symbols, and change the input method to QQ Pinyin input method (it can also be other Chinese input methods, here is just an example). Enter the pinyin of the angle, and the angle symbol will appear on the soft keyboard. Select 5 or click the angle symbol with the mouse.

Method 3: Copy with the help of formula editor.

First, type the angle symbol in Mathtype mathtype, and then copy it to the geometric sketchpad as a picture.

The above three methods can be used as corner symbols in the geometric sketchpad. The tutorial index comes from: /changjianwenti/ focus-fuhao.html. I hope it can help you.