1) A regular decagon is rotated n degrees about its center, carrying the decagon onto itself. The value of n could be 1) 10° 2) 150° 3) 225° 4) 252° An isosceles right triangle wvhose legs measure 6 is continuously rotated about one of its legs to form a three-dimensional object. The three-dimensional object is a 1) cylinder with a diameter of 6 2) cylinder with a diameter of 12 3) cone with a diameter of 6 4) cone with a diameter of 12

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