Adding Perpendicular Marks to Altitudes


Question:

I’m using your gallery image of a rectangular pyramid and working to add details to it. How can I add a dotted line that can serve as an altitude? I can draw the line, but I can’t get the little square sign to hang at the bottom. I’ve tried to draw two short lines to make the square symbol, but it is not working quite right. Do you have any suggestions?

Answer:
I would definitely be using the angle tool.

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