1. The problem asks for the perimeter of the base of a square-based pyramid. 2. The base is a square with each side measuring 6 cm. 3. The perimeter $P$ of a square is given by the formula: $$P = 4 \times \text{side length}$$ 4. Substitute the side length 6 cm: $$P = 4 \times 6 = 24$$ 5. Therefore, the perimeter of the base is 24 cm.