A torus is formed by revolving the region bounded by the circle x² + y² = 1 about the line x = 2 (see figure below). -1 - 1 y Volume = cubic units. 1 2 X Find the volume of this "doughnut-shaped" solid. (Hint: The integral √1 - 2² da represents the area of a semicircle. So you can find this specific integral without using antiderivative.)

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