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Rectangle: L × W. Circle: πr². Triangle: ½bh. L-shape: split into two rectangles, sum areas. Measure room to the inside walls and exclude closets if calculating paint needs (add them back for flooring). Subtract windows and doors for paint (about 20 sq ft each). Flooring contractors add 10% waste; tile in diagonal pattern needs 15%. 1 square foot = 144 square inches = 0.0929 m².
Area
168 sq ft