Question

which three-dimensional figure is formed by the rotation given?

Explanation:

When a right triangle is rotated around one of its legs (the vertical axis here, which aligns with one leg of the right triangle), the resulting 3D shape is a cone. The rotating leg becomes the height of the cone, and the other leg becomes the radius of the cone's circular base.

Answer:

A cone (a three-dimensional figure with a circular base and a single curved surface tapering to a point, the apex)