Question

What shape is generated when rectangle ABCD is rotated around the vertical line through A and D?

Answer 1

C. Cylinder.

Explanation:

When we rotate a rectangle around a vertical axis, we generate a cylinder.

All surface figures that can create a volumetric figure like this case, they are called Surface of Revolution, which is defined as all surfaces created by rotating a curve.

In this case, that curve is a rectangle, which by definition creates a cylinder.

Therefore, the right answer is C.

Answer 2

C. Cylinder

Explanation:

When a rectangle is rotated about a vertical line then the shape generated is a cylinder.

Thus the rectangle ABCD rotated about AD will form a cylinder.