Plot points A, B, and C, and draw a polygon, ΔABC, through the points. Draw a line perpendicular to through point B. Label the intersection of the line perpendicular to through B and point D. Measure and display the slopes of and. Display the equations of and in the Algebra margin. Measure and display the lengths of and. Calculate and display the area of ΔABC. Take a screenshot showing the geometric construction and the Algebra margin, save it, and insert the image in the space below
