Children study the image and complete the following drill work:

1. Draw a right triangular prism. Turn it into a cabin.
2. Draw an acute triangular prism. Turn it into a cabin.
3. Draw an obtuse triangular prism. Turn it into a cabin.
4. Draw cabin A below and at the right of the eye.
5. Draw cabin B at the left of the eye.
6. Draw cabin C below the eye.