Question

1a. if the polygon shown below is rotated about the x - axis, what 3 - dimensional figure will it create?
cone
sphere
cylinder
rectangular prism
pyramid

Explanation:

When a rectangle (the polygon in the figure) is rotated about an axis (the x - axis here), the resulting 3 - dimensional shape is a cylinder. A cone is formed by rotating a right - triangle, a sphere by rotating a semicircle, a rectangular prism is a 3D shape with no rotational origin from a 2D shape about an axis in the way described, and a pyramid is formed by rotating a triangle in a different configuration.

Answer:

Cylinder