2. This set of pictures should be viewed vertically. The first column, the first one is a right triangle, and the right angle side is not moving. Turning around is the cone in the second picture, and the other half is the isosceles triangle in the third picture. Similarly, the third column is the same. A rectangle becomes a cylinder, and the other half is a big square. It can be inferred that the third diagram in the second column should be a right-angled trapezoid plus the other half, and it should be a large isosceles trapezoid.

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