A graphic method of using degrees to mark angles on geometric sketchpad

The identification of angles in geometric figures such as triangles and circles is crucial for accurate measurement and drawing. In Geometry Sketchpad, using degrees to mark angles can visually display the precise value of the angle and facilitate subsequent measurements and calculations. This article will introduce in detail how to use degrees to mark angles in the geometric sketchpad, and guide everyone to easily master this practical skill.

Open the geometric sketchpad, select the [Line Segment Ruler Tool] from the toolbox on the left, and draw a ∠ABC in the blank area of ​​the sketchpad, as shown in the figure.

Measurement of angles in degrees. Use the [Move Arrow Tool] to select points A, B, and C in sequence, click the [Measurement] menu above, and select the [Angle] command from its drop-down menu. The degree of ∠ABC is displayed in the upper left corner of the drawing board.

Create dynamic text for measurement values. Select the text tool and pull out a text input box on the canvas. At this time, click the mouse on the degree of the angle measured in the previous step. At this time, you will see that a hot text of one degree has been created. After selecting the Move Arrow tool, click the text degree with the mouse. At this time, the angle measurement value will also be highlighted, as shown in the figure.

Merge dynamic text to points. Use the mouse to select the dynamic text degree and point B. At this time, hold down the [Shift key] and select the [Merge Text to Point] command under the [Edit] menu to merge the dynamic text with point B. At this time, drag point B As you change the size of the angle, the degree of the angle also changes. You will find that the angle of the measure, the hot text, and the degree on ∠ABC all change.

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