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2. Geometry
Double-click on the geometry button,
Proper Orientation
Click once on the XYPlane button,
Now, you should be looking directly at the XY plane and the axises in the bottom right corner should be oriented as they are in the image below.
Line Sketching
First, click on the sketching tab,
Next, click the line button, , and draw two vertical lines that connect the bottom left and the bottom right corners of the rectangle to the x axis. Remember that a "P" should appear when the mouse is directly over a rectangle corner and a "V" should appear when the line your drawing is vertical. Lastly, make sure that a "C" appears before you click on the x axis to terminate the line segments. You should now have an image comparable to the one below.