Final answer:
To form the figure on the left, a specific number of figures is required as per the provided grouping information.
Explanation:
The figure on the board is a triangle if and only if it has exactly three sides. The number of figures needed to form the figure on the left can be determined using the information provided. Each division of twenty-four figures can be grouped differently, resulting in 12×4 or 4×12 figures to form the larger figure.
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