The perpendicular sides of a triangular rug measure 6 feet and 9 feet. Calculate the area of the rug.

The perpendicular sides are the base and height of the triangular rug. Its area is (base × height) ÷ 2 = (6 × 9) ÷ 2 = 27 square feet, so the correct choice is 27 sq. ft.

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