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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 centimeters and the height is 7 centimeters.
Area = 1/2 * 9 * 7
Area = 63/2
Area = 31.5 square centimeters
Therefore, the area of the triangle pictured is 31.5 square centimeters.