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The area of a triangle can be calculated using the formula: area = 1/2 * base * height.
In this case, the base is 9 cm and the height is 7 cm. Plugging these values into the formula:
Area = 1/2 * 9 cm * 7 cm
Area = 1/2 * 63 cm2
Area = 31.5 cm2
Therefore, the area of the triangle pictured is 31.5 square centimeters.