GeoGebra Tutorial 12 – Pictures and Angle Measures
This is the 12th tutorial in the GeoGebra Intermediate Tutorial Series. If this is your first time to use GeoGebra, you may want to read the GeoGebra Essentials Series.
In this tutorial, we learn how to use the Insert Image tool. We insert an image of a protractor in the Graphics view, create two connected segments, and measure the angles formed by two segments. We use the Check Box the Text tools to show or hide the actual measure to see if the approximation of the applet’s user is correct. The final output of this tutorial is ideal for elementary school students for practicing their estimation skills on measuring angles.
In this tutorial, we learn the following:
- Use new tools: The Insert Image and the Semicircle through Two Points tool.
- Show/hide objects using a check box.
- Combine the text and variable using the text tool to display measures of angles.
You can view the final output of the tutorial here.
Step-by-Step Instructions
The protractor image used in this applet was from MathisFun.com. Before doing his tutorial, you need a picture of a protractor preferably in png format and with white background.