Now check your work by using the GeoGebra geometry tool to repeat parts A through D. Open and complete each step below. If you need help, follow these instructions for using GeoGebra. You will take a screenshot of your work when you are through, so be sure to clearly label your construction as you work. 1. Plot points A, B, and C, and draw a polygon, ΔABC, through the points.
2. Draw a line perpendicular to through point B.
3. Label the intersection of the line perpendicular to through B and point D.
4. Measure and display the slopes of and .
5. Display the equations of and in the Algebra margin.
6. Measure and display the lengths of and .
7. Calculate and display the area of ΔABC.