Extend the Geometric Pattern worksheet for learning and practicing pattern recognition with colorful shapes.

Final Answer:
The pattern continues by adding one more shape of the same type in each step (e.g., 1 square → 2 squares → 3 squares), or by repeating a unit shape in a consistent arrangement (e.g., triangle made of 1 small triangle → 4 small triangles → 9 small triangles, i.e., square numbers). For each row:
1. Cubes: 1, 2, 3 → next is 4 cubes in a vertical line.
2. Triangles: 1 triangle, then 4 (2×2), then 9 (3×3) small triangles forming a larger triangle → next is 16 (4×4).
3. Squares: 1, 2, 3 squares in a row → next is 4 squares in a row.

So the missing patterns are:
- Row 1: 4 stacked cubes
- Row 2: 16 small triangles arranged in a 4-row triangular shape
- Row 3: 4 squares in a horizontal line