A 3x3 matrix contains geometric shapes, each containing a certain number of dots. Row 1 has a triangle (3 sides) with 1 dot, a square (4 sides) with 2 dots, and a pentagon (5 sides) with 3 dots. Row 2 has a square (4 sides) with 2 dots, a pentagon (5 sides) with 3 dots, and a hexagon (6 sides) with 4 dots. Row 3 has a pentagon (5 sides) with 3 dots, and a hexagon (6 sides) with 4 dots. What shape and dot count should occupy the bottom-right corner of the matrix?