Perspective Drawing Exercises

This exercise was to first draw three cubes in different perspectives:

I know that my last cube, the two point with ellipses drawn in it has too small of angle between the left and right sides to be a true cube.

The bottom cube is one point perspective, the top cube is two point perspective.

This cube is three point perspective with the third point is marked on the easel above where the board is.

Then after I drew a cube, and sectioned it the used to draw an ellipse.  Then I needed to repeat this process on a two point cube.