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The area of a triangle is given by the formula: Area = 0.5 * base * height
In this case, the base (width) is 9 cm and the height is 7 cm. Plugging in these values:
Area = 0.5 * 9 cm * 7 cm
Area = 31.5 square cm
Therefore, the area of the triangle is 31.5 square cm.