# Fence Post with Square Cross Sections (AR Modeling Challenge)

- Author:
- Tim Brzezinski

- Topic:
- Square

## Students:

Using only 2 surface equations with domain restrictions, try to reconstruct this piece of wooden fence within GeoGebra Augmented Reality.

**Modeling Clue:**Cross sections of any plane parallel to the parallel to the plane y = 0 are squares whose diagonals are each 6 units long.**Hint:**What kind of 2D function has a graph that comes in the shape of the letter "V"?