Can you fit quadrilaterals into a triangle?
You're an artist who wants to create modern mosaic artwork on an equilateral triangle area with quadrilateral tiles.
Each tile is of the same shape and size (but may be in different colors, of course), and if you draw lines within each tile properly, you can divide it into smaller parts of the original shape and equal size, too.
If the whole triangular space can be filled in completely by these tiles without breaking any of it, which type of tiles do you use?
Bonus: Dear solvers, please let us appreciate your artwork if you don't mind.